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【英语时差8,16】磁极（下）

时间：2016-02-01 04:45:15

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（单词翻译）

By calculating how old the rocks are where we find these ancient compasses, we can figure out how long ago the magnetized parts were locked in. That tells us which direction was magnetic north tens of thousands of years ago. Surprisingly, it’s not always the same as north is now. Occasionally the poles change places. What is the reversal period like? So, did the north pole drift slowly southward, so that at some point magnetic north was in, say Mexico city? No. The rocks tell us that, during pole reversals, there is a several thousand year period during which the earth’s magnetic field is either gone or very much weakened. At these times north and south become arbitrary terms. Eventually the magnetic field re-establishes itself, and it seems to be a matter of chance which side comes out north and which south.
 

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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 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 ancient 8LzyY     
adj.古代的，古老的；n.古人
参考例句：
  • This is an ancient story.这是一个古老的故事。
  • Xian is an ancient city.西安是一座古城。
0 arbitrary AeHy1     
adj.任意的，任性的，主观的；专断的，武断的
参考例句：
  • A good judge does not make arbitrary decisions.一个优秀的法官不会作武断的判决。
  • You can make an arbitrary choice.你可以随便做选择。
0 as pNiyL     
conj.按照；如同
参考例句：
  • He got work in a hotel as a waiter.他在一家旅馆找到了当服务生的工作。
  • In the hotel,the old men were drinking away as usual.在旅馆里，这些老人和往常一样喝个不停。
0 become oQtyk     
v.变成，变得；vbl.变得
参考例句：
  • She has become a doctor.她已成为一名医生。
  • Sometimes the strangers become friends.有时陌生人就成了朋友。
0 calculating XxPzLq     
a.深谋远虑的，精明的
参考例句：
  • a cold and calculating killer 一个工于心计的冷酷杀手
  • His mechanical calculating engines were the antecedents of the modern computer. 他的机械计算机是现代电子计算机的雏形。
0 chance fXEzh     
n.机会，意外；运气；风险；vi.偶然发生；vt.偶然发生，冒险
参考例句：
  • We will take a chance to have the party outdoor.我们将冒险举行露天聚会。
  • This is the last chance any of us has.对于我们中的任何人来说，这是最后的一次机会。
0 change 6U0yB     
n.变化；零钱；vt.改变；更换；vi.变化；更换
参考例句：
  • You should change an idea.你应该换个思路。
  • Shall we change seats?咱们要不要交换座位？
0 city rVdyB     
n.市；城市；都市
参考例句：
  • Taipei city is an international city.台北市是国际都市。
  • Do you like living in the city?你喜欢住在都市里吗？
0 compasses e87d01034fa6deb8b85fd1d71a85fa60     
n.圆规；罗盘( compass的名词复数 )；指南针；圆规；界限
参考例句：
  • The teacher asked us to buy a pair of compasses. 老师要求我们买圆规。 来自《简明英汉词典》
  • Chinese compasses always point south! 中国的罗盘总是指向南方！ 来自英汉非文学 - 科学史
0 did SvwxP     
v.动词do的过去式
参考例句：
  • How many goals did you score in the last game?上一场比赛你们进了几个球？
  • Why did you choose basketball in the first place?你为何首先选择篮球呢？
0 direction VPqzp     
n.方向；方位；指令；说明
参考例句：
  • In which direction did he go?他朝哪个方向去了？
  • He looked in that direction and saw an airplane.他朝那个方向看，看见了一架飞机。
0 drift yk9z5     
vi.漂流(泊)；n.漂流，漂流物；大意；趋势
参考例句：
  • The leaves drift in the storm.树叶在暴风雨中飘动。
  • The drift of the icebergs in the sea endangers the ships.海上冰山的漂流危及船只的安全。
0 during Dr7x3     
prep.在…期间，在…时候
参考例句：
  • What did you do with yourself during the summer holidays?暑假你是怎样度过的？
  • London is full of visitors during May and June.五六月间伦敦挤满了游客。
0 either pq6x9     
adj.任一，两方的；prep.任一，随便任一个；conj.或，也
参考例句：
  • I have bought two books,you can have either.我买了两本书，你要哪一本都可以。
  • I don't think either of them are at home.我想他们中任何一个都不在家。
0 eventually rnBx7     
adv.终于，最后
参考例句：
  • Eventually he won the match.他终于赢得了这场比赛。
  • Their marriage eventually broke up.他们的婚姻终告破裂。
0 field qksxD     
adj.野外；n.地，田地
参考例句：
  • Go into the field and clear those boys off.到田里去把那些男孩赶走。
  • He is going across the field.他正穿越田野。
0 figure AkzxI     
n.数字，算术，图解；轮廓；vi.计算，出现，扮演角色；vt.计算在内，估计，推测，认为
参考例句：
  • I will check up the figure.我来核对一下这个数字。
  • I'm watching my figure.我一直注意保持身材。
0 itself 9qTzV8     
pron.(it的反身代词)它自己，它本身
参考例句：
  • The thing itself is not important.这事情本身并不重要。
  • The machine will start by itself in a few seconds.几秒钟后，机器将自行启动。
0 locked apMzYk     
adj.上锁的；不灵活的；锁定的；下定决心的v.锁住( lock的过去式和过去分词)；卡住，不动；陷入；卷入（困境、争论、争执等）
参考例句：
  • The family jewels are locked away in a safe. 家里的珠宝首饰都锁在保险柜里。
  • The building was locked, and all of us within felt safe. 大楼被锁上了，我们在里面感到安全。 来自《简明英汉词典》
0 long M01xN     
adj.长的
参考例句：
  • Summer is the season of long days.夏天是日长的季节。
  • Winter is the season of long nights.冬季是夜长的季节。
0 magnetic 6kTyV     
adj.磁的，有磁性的；有吸引力的，有魅力的
参考例句：
  • If we charge it with electricity,it will become magnetic.如果充上电，它就会带有磁性。
  • I have a magnetic disc.我有一张磁盘。
0 matter cBExQ     
n.事情；问题；麻烦事，毛病
参考例句：
  • It is just a matter of time.这只是个时间问题。
  • This matter is very important.这件事很重要。
0 Mexico ho8zON     
n.墨西哥
参考例句：
  • They took me to Mexico.他们把我带到墨西哥。
  • Mexico is a beautiful country.墨西哥是个美丽的国家。
0 north wHSxf     
n./adj.北；北方（的）
参考例句：
  • I'm from the north of China.我来自中国的北方。
  • Canada lies to the north of the United States.加拿大在美国的北面。
0 occasionally EInxn     
adv.偶然地；非经常地
参考例句：
  • He went on talking,occasionally wiping at his face with a towel.他继续说着，偶尔用毛巾擦一下脸。
  • I like playing football best,but occasionally I play table tennis,too.我最喜欢踢足球，偶尔也打打乒乓球。
0 parts 78f0805fa8ffadabda721fdaf85b3ca9     
n.部( part的名词复数 )；一部分；零件；角色
参考例句：
  • Creolized forms of Latin were spoken in various parts of Europe. 当时欧洲各地区都讲克里奥尔语形式的拉丁语。
  • The heavy rain has caused floods in many parts of the country. 大雨使全国许多地方泛滥成灾。
0 period vMNx3     
n.学时，课时；一段时间，时期，周期；句点
参考例句：
  • Trade is always good over the Christmas period.圣诞节期间生意一向很好。
  • He nursed the company through a difficult period.他帮助公司渡过了一段困难时期。
0 places ab7dc89534e36069de69a74fe634aa31     
n.位( place的名词复数 )；地方；职位；座位
参考例句：
  • They intend to allocate more places to mature students this year. 今年他们打算给成人学生提供更多的名额。
  • Plaster had fallen away in places, exposing the brickwork. 有些地方的灰泥脱落了，露出了砖。
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 pole IOJxB     
n.极点，磁极，电极，杆，竿，相反的极端；vt.用竿支撑，用棒推；vi.撑篙
参考例句：
  • The earth's poles are called the North Pole and the South Pole.地球的极点称作北极和南极。
  • The horse broke away from my horse pole and ran wild.这匹烈马挣断了我的套马杆狂奔起来。
0 Poles 81679595e7eddf97059c8751d80fe5b0     
波兰人( Pole的名词复数 )
参考例句：
  • The earth's axis is the line between the North and South Poles. 地轴是南北极之间的线。
  • The two authors represent the opposite poles of fictional genius. 这两位作者代表了天才小说家两个极端。
0 rocks rocks     
n.岩石( rock的名词复数 )；石头；岩块；摇滚乐v.（使）来回摆动( rock的第三人称单数 )；使震惊，使受震动
参考例句：
  • a cleft in the rocks 岩石的裂缝
  • The waves swirled and eddied around the rocks. 波浪翻滚着在岩石周围打旋。
0 seems a170c4cb1ae103745ec02e015cb86727     
v.好像，仿佛( seem的第三人称单数 )
参考例句：
  • She seems to feel ambivalent about her new job. 她似乎对新工作忧喜参半。
  • Her return to the team now seems a certainty. 她的归队现在似乎已成定局。
0 several STMzb     
adj.几个，若干，数个；各个的，各自的
参考例句：
  • Words often have several meanings.单词往往有若干个意思。
  • Several new members have come into the club since last year.自去年以来，又有些新成员加入了俱乐部。
0 side Ay6w0     
n.边，旁边；面，侧面
参考例句：
  • The shop is on the west side of the street.商店在街道的西边。
  • There was a lot of people on every side. 到处都是人。
0 slowly Qx4wE     
adv.慢地，缓慢地
参考例句：
  • Speak more slowly,please.请说慢一点。
  • Do it slowly and carefully.要慢慢仔细地做。
0 south hwLwO     
n.南，南方
参考例句：
  • Are you from the south?你是南方人吗？
  • The house points to the south.那座房子面朝南。
0 surprisingly Qrdwe     
ad.令人惊讶地
参考例句：
  • They appeared surprisingly pessimistic about their chances of winning. 他们对胜利的可能性显得出奇地悲观。
  • a surprisingly roomy car 出奇宽敞的汽车
0 terms NgwzbP     
n.条件；表达方式；措辞；说法；任期( term的名词复数 )；（学校的）学期；[复数]（合同、付款、价格等的）条件；时期
参考例句：
  • We're all on Christian name terms here. 我们这里所有的人都用教名相互称呼。
  • He was imprisoned for two concurrent terms of 30 months and 18 months. 他被判处30个月和18个月的监禁，合并执行。
0 thousand 6ojwe     
num./n./a.一千；（pl.）许许多多，成千上万
参考例句：
  • How many hundreds are there in a thousand?一千里有多少个一百？
  • The college has five thousand teachers and students in all.该校共有师生5千人。
0 thousands a41a437af2af56816d6c090740a5aca1     
n.数千；一千( thousand的名词复数 )；数千；许许多多；千位数
参考例句：
  • Thousands of small fish are thrown back into the sea as bycatch. 成千上万误捕的小鱼扔回大海中去了。
  • Thousands of supporters converged on London for the rally. 成千上万的支持者从四面八方汇聚伦敦举行集会。
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 weakened c1f3d06fe73213e90240cb347ea5a049     
adj.虚弱的v.（使）削弱， （使）变弱( weaken的过去式和过去分词 )
参考例句：
  • The team has been weakened by injury. 这个队因伤实力减弱。
  • In his weakened condition, he is very susceptible to cold. 他身体很弱，因此很容易患感冒。 来自《简明英汉词典》
0 year mfzwM     
n.年，年度，学年；adj./adv.每年，一年一次
参考例句：
  • Four seasons make a year.四季构成了一年。
  • Spring is the beginning of the year.春天是一年的开始。
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。

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