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时差N小时 只有在地球上才能燃烧?(上)

时间:2021-11-04 07:21:57

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(单词翻译)

What is fire anyway?

火究竟是什么?

Well, fire is rapid oxidization. It's the energy released when oxygen atoms start combining with carbon and hydrogen atoms.

火,即燃烧,是快速的氧化反应。氧化反应是氧原子和碳原子或氢原子结合释放能量。

Exactly, so without oxygen in the air, nothing burns.

没错,那么如果空气中没有氧气,就不会有燃烧。

You mean there was a time before oxygen?

你是说氧气还不存在的那个时代?

By roughly a billion years ago, simple forms of plant life called "eukaryotes" were already busily converting carbon dioxide into oxygen gas, just like their descendants do today.

大约十亿年前,和眼下的植物一样,地球上最原始的植物祖先“真核细胞”忙碌地将二氧化碳转变成氧气。


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0 busily rSYyK     
adv.忙碌地;起劲地
参考例句:
  • All were busily engaged,men at their ploughs,women at their looms. 大家都很忙,男的耕田,女的织布。 来自《简明英汉词典》
  • A swarm of ants are moving busily. 一群蚂蚁正在忙碌地搬家。 来自《简明英汉词典》
0 just M3rxN     
adv.仅仅,只是;刚刚
参考例句:
  • He is just a child.他只是个孩子。
  • We just missed the train.我们正好没有赶上火车。
0 anyway eMoy3     
adv.不管怎样;无论如何
参考例句:
  • Anyway I'm free now . Let me go with you. 我反正闲着没事,就陪你走一趟吧。
  • Anyway, you can try. 至少你可以试试。
0 burns 46defce884d1be32019f20864172323d     
n.络腮胡子,大鬓角;烧伤,烧痕( burn的名词复数 )v.(使)燃烧( burn的第三人称单数 );使用某物为燃料;烧毁;烧坏
参考例句:
  • Air Vice-Marshal Andrew Burns 空军少将安德鲁∙伯恩斯
  • The power plant burns used vehicle tyres as fuel. 这家电厂用废弃轮胎作燃料。 来自《简明英汉词典》
0 combining 4290c1493433c66890e3ad3b04662610     
n.结合性的,化合的v.(使)联合( combine的现在分词 );兼有;兼备;使融合(或并存)
参考例句:
  • This education aimed at combining brain work with manual labour. 此项教育的目的在于实现脑力劳动与体力劳动相结合。 来自《简明英汉词典》
  • The process of combining incoming messages into a single message. 将输入的多个报文合并成一条报文的过程。 来自辞典例句
0 hydrogen qbBxr     
n.氢元素,氢气
参考例句:
  • Water is made up of atoms of hydrogen and oxygen.水由氢和氧的原子构成。
  • A chemist can isolate the oxygen from the hydrogen in water.一个化学家能把水中的氧和氢分解。
0 plant gNLxZ     
n.植物;v.种植;n.工厂
参考例句:
  • We plant many trees every year.我们每年种植许多树。
  • What do you think of our plant?您认为我们工厂如何?
0 air 5KuyO     
n.空气
参考例句:
  • We know air has weight.我们知道空气有重量。
  • I opened the window and took a breath of fresh air. 我打开窗子,吸了一口新鲜空气。
0 life C1LxR     
n.生活;生命
参考例句:
  • The doctor came in time to save his life.医生及时来抢救他的生命。
  • At last he knew the meaning of life.终于,他知道了生命的意义。
0 released 23690fd759f17135ec9879b56ff2600c     
v.释放( release的过去式和过去分词 );放开;发布;发行
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • With hindsight it is easy to say they should not have released him. 事后才说他们本不应该释放他,这倒容易。
0 called 4f33252742282f871b0617168156fd55     
v.叫( call的过去式和过去分词 );通电话;认为;估计
参考例句:
  • She sensed something was amiss and called the police. 她觉得有点不对头,就叫了警察。
  • I called several times, but only got the answering machine. 我打了几次电话,但只有电话答录机答话。
0 mean PCUxz     
v.意指;指示
参考例句:
  • What do you mean by opening my letters?你打开我的信用意何在?
  • It does mean you have learned something.它意味着你学有所成。
0 years 75aeb98e5241592ad6a6c2c4c78a16ef     
n.年( year的名词复数 );年纪;一年的期间;某年级的学生
参考例句:
  • She is still very active, in spite of her advancing years. 她尽管年事渐高,仍然十分活跃。
  • Travelling in Europe was something of an anticlimax after the years he'd spent in Africa. 他在非洲生活了多年,到欧洲旅行真是有点太平淡了。
0 start 4u2wi     
v.开始;着手;出发
参考例句:
  • When do I start work?我什么时候开始工作?
  • Where do we start?我们从哪里开始?
0 rapid pAnzg     
adj.迅速的,急促的;n.急流
参考例句:
  • She had a strong will and power of rapid decision.她具有坚强的意志和速决的才能。
  • He has made rapid progress in his studies.他在学业上有着迅速的进步。
0 billion 2WIzm     
num.十亿;数以十亿计;大量;一万亿
参考例句:
  • A billion is a large number.十亿是个大数目。
  • They've spent nearly a billion dollars on it already.他们已经在那上面花了近10亿美元。
0 was bglwv     
v.(is,am的过去式)是,在
参考例句:
  • He said he was right.他说他是正确的。
  • He was cold and hungry.他又冷又饿。
0 nothing 6Hqx7     
adv.毫不;n.微不足道的人或事;pron.什么也没有
参考例句:
  • I have nothing to do at the moment.此刻我无事可做。
  • She knows nothing about music.她一点也不懂音乐。
0 converting ec668d4db793501ce7ecf6afb576007a     
n.吹(炉冶)炼,转炉炼钢v.(使)转变( convert的现在分词 );(使)转化;皈依;改变(信仰)
参考例句:
  • Jim's got some half-baked idea about converting his garage into a sauna. 吉姆初步计划把他的车库改造成一个蒸汽浴室。 来自《简明英汉词典》
  • Quite recently man has succeeded in converting sunlight directly into electrical energy. 最近人们已经成功地把太阳光直接转化为电能。 来自《现代汉英综合大词典》
0 descendants 2e9718a24aabd2cb6a803a7e4eb742fb     
n. 后代,后裔 名词descendant的复数形式
参考例句:
  • They were the direct descendants of the Dutch settlers. 他们是荷兰移民的直系后裔。
  • They are the descendants of Queen Victoria. 他们是维多利亚女王的后裔。
0 simple AyMwQ     
adj.简单的,易懂的,单纯的,纯朴的
参考例句:
  • He wrote a story in simple English.他用简单的英语写了一则故事。
  • He was as simple as a child.他像孩子一样天真。
0 energy w8oyS     
n.活力,精力,能力,能,能量
参考例句:
  • He is full of energy.他充满了活力。
  • It took a lot of energy to move the furniture.搬这些家具费了很大劲。
0 carbon kTeyA     
n.碳元素
参考例句:
  • Diamonds are pure carbon.钻石是纯净的碳。
  • Carbon is an element,while carbon dioxide is a compound.碳是一种(化学)元素,而二氧化碳则是一种化合物。
0 ago LKGyH     
adv./adj.以前(的),以往(的)
参考例句:
  • Where were you two years ago?两年前你在哪里?
  • Sheila was here a moment ago.不久以前希拉还在这里。
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 atoms 2bb8d809d871a7c1a392fec36563a8f7     
原子( atom的名词复数 ); 原子能; 微粒; 微量
参考例句:
  • A molecule of water consists of two atoms of hydrogen and one atom of oxygen. 水分子由两个氢原子和一个氧原子构成。
  • A nuclear reactor is the apparatus in which atoms are split. 核反应堆是分裂原子的装置。
0 exactly Xn7xG     
adv.准确地;严格地
参考例句:
  • What I want is exactly this one.我要的就是这一个。
  • I beg your pardon,what you say is not exactly correct.对不起,你说的话并不完全对。
0 without XfSwo     
adv.在外面;n.外面,外部;prep.无,没有
参考例句:
  • He stood there without moving.他站那儿没有动。
  • The sound comes from without.那声音从外面来。
0 forms ac68b62abfd6a9fe26e8ac4236c8ce0c     
n.形状( form的名词复数 );(空白)表格(纸);方式;组成v.形成,构成,产生( form的第三人称单数 );是;(使)成形;结成(友谊)
参考例句:
  • students involved in all forms of college athletics 参加各种大学体育运动的学生
  • Agriculture forms the backbone of the rural economy. 农业是农村经济的基础。
0 gas 7fWzL     
n.煤气,气体,汽油;vt.毒(死),加油
参考例句:
  • I seem to smell gas.我好像闻到煤气味儿。
  • There are several kinds of gas in the air.空气中有几种气体。
0 already wLByk     
adv.已经
参考例句:
  • We have eaten already.我们已经吃过了。
  • I've been there already,so I don't want to go again.我早已去过那里了,所以我不想再去了。
0 roughly nXrxK     
adv.概略地,粗糙地,粗鲁地
参考例句:
  • If you treat your coat so roughly,it will be worn out soon.你如果这么糟蹋你的外套,它很快就不能穿了。
  • The island is roughly circular in shape.这个岛屿大致是圆形的。
0 dioxide Muwxn     
n.二氧化物
参考例句:
  • The oxygen and the carbon combine to form carbon dioxide.氧和碳化合,形成二氧化碳。
  • Carbon dioxide is the largest contributor to the greenhouse effect.二氧化碳太多是道致温室效应的最主要原因。
0 oxygen sK2xg     
n.氧;氧气
参考例句:
  • Oxygen is presnt in the air.氧存在于空气中。
  • We need oxygen to support life.我们需要氧气维持生命。
0 before sQwyg     
prep./conj.在…以前
参考例句:
  • She needs the work done before tomorrow.她必须在明天以前找人完成这项工作。
  • I must finish this letter before I go home.我必须在回家以前写完这封信。

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