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时差N小时 为什么彩虹是弯曲的?

时间:2021-05-06 08:41:30

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(单词翻译)

Why Rainbows Are Curved?

为什么彩虹是弯曲的?

To see why rainbows are curved, it helps to understand what causes them in the first place.

要明白彩虹为什么是弯曲的,首先要知道彩虹是怎么形成的。

We see rainbows when rain is falling in front of us and the sun is shining behind us.

下雨时,背对着太阳,我们就会看见彩虹。

When sunlight enters raindrops most of it passes straight through.

当光线射进雨滴时,大多数光线会直接穿过雨滴。

But some of the light strikes the drop at such an angle that it's separated into the rainbow colors and reflected back out the front of the drop.

但是以一定角度射入雨滴的光线,会发生色散,形成不同颜色的光线。折射光线又在雨滴的背面发生反射。

Each color is reflected at a slightly different angle, but all between forty and forty-two degrees.

每一种颜色的光线亦以不同的角度反射。反射角度有细微差别,但均在40至42度范围内。

The narrow range of angles at which the colors are reflected is the key to why rainbows must the curved.

彩虹弯曲的关键在于不同颜色光线的反射角度。

The next time you see a rainbow notice that you are in the center of the arc, and that if you move the rainbow moves with you.

下次看见彩虹,注意一下,你就会发现你处在圆弧中心的位置。

This is because even though all the raindrops out there are reflecting rainbow colors, they do so in very narrow beams.

这是因为即使所有的雨滴都反射光线,但是都是以极其狭窄的光束为单位进行。

You see the colors from only those drops whose beams shine on you.

只有经雨滴反射的光束射入你的眼睛,你才会看见彩色的光。

The only shape that will allow the light beams to shine on you at the precise angles is an arc or a circle with you at the center so that you are always the same distance and angle from any point on the arc.

把所有以一定角度射入眼球的光线连接起来,只能形成圆弧或者是以你为中心的圆圈。因此你与弧形上任何一点总是保持着同样的距离。


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0 allow 8LXyr     
vi.(for)考虑到;vt. 允许,准许
参考例句:
  • Will your father allow us to use his telephone?你父亲肯让我们使用他的电话吗?
  • The river is too deep to allow of swimming.河太深,不能游泳。
0 always uLSyb     
adv.总是,无例外地;永远,始终
参考例句:
  • The nurse is always full of thought for her patients.这名护士对病人总是关心备至。
  • You are always welcome here.在这儿你永远受欢迎。
0 angle nVPz0     
n.角,角度,立场,观点
参考例句:
  • The high jumper took off at a bad angle.跳高运动员的起跳角度不好。
  • The old house leans to the right at a dangerous angle.那所老宅向右斜得很危险。
0 angles 9bd139e0f52be4a748903ff60b5d3985     
n.角( angle的名词复数 );[比喻](考虑、问题的)角度;观点;轮廓鲜明的突出体
参考例句:
  • She angles her reports to suit the people she is speaking to. 她带着一定的倾向性作报告以迎合她的听众。 来自《简明英汉词典》
  • Angles of less than 90 degrees are called acute angles. 小于90度的角叫锐角。 来自《简明英汉词典》
0 any rMyy5     
adj.任何的;所有的
参考例句:
  • I don't have any hobbies.我没有任何的爱好。
  • It isn't any use.它任何用途都没有。
0 arc FvFzj     
n.弧形(物),弧,电弧,弧光
参考例句:
  • The sun appears to move in an arc across the sky.太阳看起来在天空中以弧形运行。
  • The rainbow described an arc in the dark sky.彩虹在昏暗的天空划出了一道圆弧。
0 beams de3a31fb6d382041f309091b4b19c647     
n.梁( beam的名词复数 );束;1 光线;(电波的)波束v.发出光与热( beam的第三人称单数 );面露喜色;播送;1 笑容满面,眉开眼笑 2 发射电波,播送 3 放出束状的光(或热)
参考例句:
  • The beams are riddled with woodworm. 这些木梁被蛀虫蛀得都是洞。
  • In front were five rooms with painted beams and carved pillars. 正面五间上房,皆是画梁雕栋。 来自《现代汉英综合大词典》
0 because EQXyl     
conj.由于,因为
参考例句:
  • Because his car is old.因为他的汽车旧了。
  • He was late because of an accident.他是因事故而迟到的。
0 between qQUyN     
prep.在…之间,在(两者)之间;adv.在中间
参考例句:
  • God will judge between you and me.上帝会在你我之间作出裁决。
  • I will come between twelve and one o'clock.我会在12点至1点之间来。
0 causes efae2e5474683275c05fc3370e4ddcb3     
n.原因( cause的名词复数 );动机;(某种行为、感情等的)理由;缘故
参考例句:
  • The book is an analysis of poverty and its causes. 这本书分析了贫困及其原因。
  • an essay on the causes of the First World War 关于第一次世界大战起因的文章
0 center FU5yk     
n.中心,中央;vi.居中;vt.使集中
参考例句:
  • The new sports center is a big success.新建的体育中心获得巨大成功。
  • Alice stood in the center of a large group.爱丽丝站在一大群人的中央。
0 circle LV5y9     
n.圆,圈,环
参考例句:
  • What letter is a circle?什么字母是个圆圈?
  • Oh,a giant circle!哦,一个大回环!
0 color YWVyP     
vt.给…着色;涂色
参考例句:
  • She likes the rose color best.她最喜欢玫瑰色。
  • Red is their lucky color.红色是他们的幸运色。
0 colors 62848e3ce5804aa985513a7922ff87b2     
n.国旗;旗帜;船旗;军旗;颜色( color的名词复数 );肤色;颜料;本质
参考例句:
  • His coat was woven from wool of many colors. 他的外套是用多种颜色的毛线织成的。 来自《简明英汉词典》
  • I just curled up when I saw the colors he had chosen. 看到他选择的颜色,我真感到恶心。 来自《简明英汉词典》
0 curved CvNzJL     
a.弯曲的
参考例句:
  • His lips curved in a barely perceptible smile. 他的嘴角弯了弯,露出一丝几乎察觉不到的笑容。
  • The missile curved gracefully towards its target. 导弹呈优美的曲线状飞向目标。
0 degrees 18daee01fc6e54aacd7f4c2eef60ff4d     
n.度( degree的名词复数 );程度;学位;(组织损伤的)深度
参考例句:
  • It will be a mild night, around nine degrees Celsius. 晚间天气温和,温度约九摄氏度。
  • a temperature of 40 degrees centigrade 40摄氏度的温度
0 different LmJyb     
adj.不同的,有区别的,不一致的
参考例句:
  • We are in different classes.我们在不同的班级。
  • I had a different idea.我有一个不同的主意。
0 distance Hs3xx     
n.距离;路程
参考例句:
  • A very small distance or space.非常小的距离或空间。
  • It depends on traffic and distance.这要看交通和路程的远近。
0 drop 3rJxl     
v.掉下;落下;n.滴;水滴
参考例句:
  • There's not a drop left.一滴也不剩。
  • Don't drop your chopsticks.不要让筷子掉到地上。
0 drops 8459e2a2318870facfc5cf56049ed3d3     
v.(使)落下( drop的第三人称单数 );投下;(使)降低;减少n.滴剂;滴,少量(drop的复数形式)
参考例句:
  • He tasted different kinds of spirituous liquors in drops. 他把不同的酒都呷一口品尝一下。 来自《简明英汉词典》
  • As the river drops from the plateau, it forms great waterfalls. 河水从高原上下落时,形成了巨大的瀑布。 来自《现代汉英综合大词典》
0 each yrNxG     
adj.每个,每,每一;adv.每个;int.每个,个人,个自
参考例句:
  • Each boy has a textbook.每个男孩都有课本。
  • Each child brought a little present to the mother.每个孩子给母亲带来一件小礼物。
0 enters ac7091f0a5db64e9059789cdea87e4c2     
v.进入( enter的第三人称单数 );进去;参加;登记
参考例句:
  • Nearly everybody enters for 'The Nicest Garden Competition' each year, but Joe wins everytime. 几乎每年每人都报名参加“最佳花园赛”,但每次都是乔获胜。 来自《用法词典》
  • A boy who has good manners stands up in an automatic movement when a lady enters the room. 一个有礼貌的孩子,在一个女士进入房间时,便会不假思索地站起来。 来自《简明英汉词典》
0 even EiUzR     
adj.平坦的,偶数的,相等的;adv.甚至,恰好,正当
参考例句:
  • It was cold yesterday,but it's even colder today. 昨天冷,今天更冷了。
  • He's the best teacher even though he has the least experience.尽管他经验最少,但教得最好。
0 falling ctWzF5     
n.落下;坠落;下降;陷落adj.落下的,下降的v.降低( fall的现在分词 );来临;成为;降落
参考例句:
  • Note the rising and falling tones. 注意“rising”和“falling”的音调。 来自超越目标英语 第3册
  • Two children drowned after falling into the river. 两个孩子掉进河里淹死了。
0 first FjMxx     
adj.第一的;adv.首先
参考例句:
  • What should I do first?我该首先做什么?
  • That is the first question.这是第一个问题。
0 forty Zi4x1     
num.四十,第四十
参考例句:
  • The woman may be forty.那位妇女可能有四十岁。
  • Life begins at forty.[谚]人生始于四十。
0 front nhpxq     
adj.前面的;n.前面,正面;前线;v.面对,朝向
参考例句:
  • She sits in front of me.她坐在我前面。
  • This is our front garden.这是我们的前花园。
0 helps 74c6abe13f6fc1bafd3575a8d055c56d     
n.助手( help的名词复数 );补救办法;有用v.帮助( help的第三人称单数 );有助于,有利于;治疗;避免
参考例句:
  • My family helps to keep me centred. 家人帮助我保持冷静。
  • He always helps with the housework. 他总是帮着做家务。
0 it's MqtzUn     
(=it is;it has)
参考例句:
  • In "It's a bloody miracle!", "bloody" is used as an intensive word. 在“It‘s a bloody miracle!”一句中,bloody是用作加强语气的词。
  • According to Mick, it's a great movie. 据米克说,这是一部了不起的电影。
0 key V3ZxX     
n.答案;钥匙;关键;adj.基本的
参考例句:
  • I lost my key.我把钥匙丢了。
  • This will be key.这将是关键出路。
0 light 61SxT     
n.光,光亮,灯;adj.轻的,光亮的,容易的;v.点燃,著火,变亮
参考例句:
  • The sun gives light and heat.太阳发出光和热。
  • The traffice light was green.交通信号灯是绿色。
0 most 9nczju     
adj.最多的(many,much的最高级)
参考例句:
  • Most students like pop songs.大多数学生喜欢流行歌曲。
  • Math is the most difficult.数学是最难的。
0 move 5Fpxr     
vt.移动;感动;vi.移动;运行;n.走棋;步骤
参考例句:
  • I move the mouse by hand.我用手移动鼠标。
  • Would you help me move the table?你能帮忙我移一下桌子吗?
0 moves 85b51ace16ad425d5d1e15832fc38da0     
鸽子
参考例句:
  • The doves winged skyward. 鸽子向空中飞去。 来自《简明英汉词典》
  • The doves were cooing in the trees. 鸽子在林中咕咕啼鸣。 来自《现代汉英综合大词典》
0 narrow CFPxT     
n.狭窄部份,海峡,隘路;adj.狭窄的,精密的,有限的;v.变窄,使...狭窄
参考例句:
  • The bridge is too narrow for two cars to pass.这桥太窄,并排通不过两辆车。
  • The captain sailed his ship through the narrow channel.船长驾驶他的船穿过了狭窄的航道。
0 notice SH1x7     
n.通知,布告;注意,认识;vt.看到,注意到
参考例句:
  • Post this notice on the wall.把这个通知贴在墙上。
  • I didn't notice you when you passed by.你走过时,我没有注意到你。
0 only bIzxE     
adv.仅仅,只不过;adj.唯一的;conj.可是,不过
参考例句:
  • We have only one earth.我们只有一个地球。
  • I only found it by accident.我只是碰巧找到的。
0 passes 9560f74c21930b7caa3634d647f52e6f     
v.走过( pass的第三人称单数 );通过;批准;度过
参考例句:
  • For this course, you need two GCE Advanced Level passes. 要学这个学程,就须要通过普通教育证书两门学科的高级证书考试。
  • Water passes into the roots of a plant by osmosis. 水渗透至植物根部。
0 place V2Jz5     
n.地方;名次;地位;寓所;vt.放置;订(货)
参考例句:
  • Beijing is a good place.北京是个好地方。
  • Place the pillows at the head of the bed.把枕头放置在床头。
0 point zO4x1     
n.点,要点,尖端,细节,目标;v.指出,瞄准
参考例句:
  • He missed the point of the joke.他错过了那个笑话的要点。
  • Do you have any questions at this point?就这一点你们还有什么问题吗?
0 precise tSpz5     
adj.精确的,恰好的,极清楚的
参考例句:
  • At that precise moment, Miss Pulteney came into the office.就在那时,普尔特尼小姐走进了办公室。
  • A scientist must be precise in making tests.科学家做试验必须精确。
0 rainbow xT9xj     
n.虹,彩虹
参考例句:
  • There is a rainbow in the sky.天上有一道彩虹。
  • Sometimes there is a rainbow after rain.有时候雨后会有彩虹。
0 rainbows edce768ca717829f79c894f028392d9e     
n.彩虹( rainbow的名词复数 )
参考例句:
  • Stop sitting there chasing rainbows. Get out and do some work. 别坐着想入非非了,出去干点活。 来自辞典例句
  • The two old people shimmered in brief rainbows. 老两口的脸在短暂的霓虹中微微闪光。 来自辞典例句
0 range bThxb     
n.山脉,行列,范围,射程;vt.排列,归类于,使并列,放牧;vi.平行,延伸,漫游
参考例句:
  • The two countries are separated by a range of mountains.这两个国家被一条山脉隔开。
  • This weapon can kill at a range of 200 yards.这种兵器在200码内有杀伤力。
0 reflected IkozOY     
adj.反射的,得自他人的v.反射(光、热、声或影像)( reflect的过去式和过去分词 );考虑;反照;表达
参考例句:
  • The windows were shining in the reflected rays of the setting sun. 窗户上闪耀着落日的余晖。
  • His face was reflected in the mirror. 他的脸映照在镜子里。
0 reflecting 57c32eea78603bb965b1e051309efbca     
adj.反射的,引起反射的;沉思的v.反射(光、热、声或影像)( reflect的现在分词 );考虑;反照;表达
参考例句:
  • After reflecting for a time he decided not to go. 思考了一会儿以后,他决定不去了。 来自《简明英汉词典》
  • The light reflecting off the snow was dazzling. 雪的反光很刺眼。 来自《简明英汉词典》
0 separated giszqy     
adj.分开的v.分开(separate的过去式和过去分词)
参考例句:
  • Her parents are separated but not divorced. 她父母分居但没离婚。
  • No child should ever be separated from his mother by force. 绝不能强行使任何一个孩子与母亲分开。 来自《简明英汉词典》
0 shape HzBwT     
n.形状,形式,定形,身材;vt.定形,使...成形,塑造
参考例句:
  • What shape can you see?你能看到什么形状?
  • All circles have the same shape.所有的圆形状都一样。
0 shine REVzj     
vi.发光;照耀,闪耀
参考例句:
  • The stars shine in the sky.星星在天空闪烁.
  • The sun is shinning brightly.今天阳光格外明媚。
0 shining AiDzeK     
adj.光亮的;华丽的v.发光( shine的现在分词)
参考例句:
  • Although the sun was shining it wasn't very warm. 尽管太阳高照,却不很暖和。
  • The windows were shining in the reflected rays of the setting sun. 窗户上闪耀着落日的余晖。
0 straight Atxws     
adv.一直;直接;adj.直的,笔直的;正值的
参考例句:
  • His hair is dark and straight.他是黑色直头发。
  • Just go straight forward and you'll find the post office.邮局就在前边。
0 strikes b42d5edd48d56a1e0e570e33419f9375     
n.袭击( strike的名词复数 );罢工[课,市];突然发现v.打( strike的第三人称单数 );击;敲响;报时
参考例句:
  • He always strikes such a dignified pose before his girlfriend. 他总是在女友面前摆出这种庄严的姿态。 来自《简明英汉词典》
  • The present wave of strikes stems from discontent among the lower-paid. 当前的罢工浪潮起因于低工资雇员们的不满情绪。 来自《简明英汉词典》
0 such psww9     
adj.如此的,这样的;pron.这样的;adv.如此地
参考例句:
  • He is such a man.他是这样一个人。
  • He spent all his money,he is such a fool.他这样傻,花光了所有的钱。
0 sunlight ts3wM     
n.日光,阳光,日照
参考例句:
  • The room was flooded with warm and golden sunlight.房间充满着温暖、金色的阳光。
  • In the bright sunlight she had to narrow her eyes.在强烈阳光下她必须眯着双眼。
0 though lIRzS     
conj.虽然,尽管;即使;可是,不过,然而;adv.可是,不过,然而
参考例句:
  • It's quite pleasant today,though the wind is rather cool.尽管风有点凉,今天天气还是很不错的。
  • I will have a try even though I should fail.哪怕失败,我也要试一下。
0 through 1IMzX     
adv.穿越,完全;prep.经过,穿过,凭借
参考例句:
  • He was running through the streets.他跑着穿过条条街道。
  • The train went through a tunnel.火车通过一条隧道。
0 understand lkEwp     
vt.理解,闻知;vi.理解,相信,表示同情
参考例句:
  • I understand how you feel.我了解你的心情。
  • Do you understand this idea?你理解这种想法吗?

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