previously
- adv.先前;(一段时间)以前
最高级： most previously 比较级： more previously
previous adj.以前的 + -ly ...地
previouslypreviously
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ADV 先前；以前
Previously means at some time before the period that you are talking about.Guyana's railways were previously owned by private companies...
圭亚那的铁路以前是归私有企业所有的。
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ADV （一段时间）以前
You can use previously to say how much earlier one event was than another event.He had first entered the House 12 years previously...
12年前，他首次成为议员。
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3
如果谈论过去某个时间以前的时间，用 before 或者 previously：He had died a month before（他一个月前去世了），She had rented the flat some fourteen months previously（她大约14个月以前租下了这套公寓）。ago仅用于谈论现在之前的某段时间。for用来表示过去、现在或将来持续的一段时间或者某事多长时间没有发生，如：She slept for eight hours（她睡了8个小时），He will be away for three weeks（他会离开3个星期），I hadn't seen him for four years（我已经有4年没有见过他了）。since用来表示某段时间的开始，如：She has been with the group since it began（自从该集团创立起她就一直在其中工作），the first civilian president since the coup 17 years ago（自从17年前发生政变以来的第一位平民总统），since也可以用来某事最后一次发生的时间或者某事多长时间没有发生，如：She hadn't eaten since breakfast（她早餐以后就没吃过东西），It was a long time since she had been to church（她好久没去过教堂了）。
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I should like to add a corrective to what I have written previously .
我想对我先前写的内容进行补充修改。
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Marine life was discovered at depths previously thought to be azoic .
在先前被认为没有任何生命迹象的海洋深处发现了海洋生物。
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The building had previously been used as a hotel .
这座楼房早先曾用作旅馆。
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Some drugs are being used on a much larger scale than previously .
与以前相比，某些药物的使用范围更广了。
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Many previously separate groups are now operating under the umbrella of a single authority .
许多原本分散的团体现在正在单一的权威领导下运作。
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Thanks to the automobile , Americans soon had a freedom of movement previously unknown .
由于有了汽车，美国人很快就获得了前所未有的行动自由。
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His statement ran athwart what was previously said .
他讲的话与先前所说的相抵触。
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The drug is to be reclassified after trials showed it to be more harmful than previously thought .
试验显示这种药比先前想象的危害更大，要重新归类。
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Previously she had very little time to work in her own garden .
以前，她没什么时间打理自己的花园。
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Radiation may damage cells in a way that was previously unforeseen
辐射可能以一种我们过去未能预见到的方式破坏细胞。
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He had first entered the House 12 years previously
12年前，他首次成为议员。
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The changed outlook entails higher economic growth than was previously assumed
观念的改变势必会使得经济增长高于之前预计的水平。
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The document was previously circulated in New York at the United Nations
这份文件先前在纽约的联合国总部传阅过。
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Reviews are distilled from articles previously published in the main column
述评是从先前刊登在主要专栏的文章中提炼出来的。
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The contract was awarded to a previously unknown company
合同签给了一个之前并不知名的公司。
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He may suddenly take a dislike to foods that he 's previously enjoyed .
对以前爱吃的食物，他兴许突然就没了胃口。
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The evidence given in court was inconsistent with what he had previously told them .
法庭上的证词与他当初告诉他们的不一致。
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She had rented the flat from the council some fourteen months previously .
大约14个月以前，她从地方政府那里租下了这套公寓。
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Guyana 's railways were previously owned by private companies
圭亚那的铁路以前是归私有企业所有的。
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We print a selection of previously unseen photos from the Spanish rider 's early years .
我们选了这位西班牙骑手早年一些不为人知的照片刊登出来。
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It was previously a small monastery but the authorities turned all the monks out .
那里原先是座小寺庙，但当局把所有僧侣都撵走了。
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These black models are moving in on what was previously white territory : the lucrative cosmetic contracts .
黑人模特正逐步涉足曾是白人主宰的领地：签约获利丰厚的化妆品行业。
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Spassky had never previously lost to his antagonist .
斯帕斯基以往从未输给过他的对手。
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The two fighters had previously boxed a 12-round match .
这两位拳击手之前已经打了一场12回合的比赛。
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By 2005 he wants half of all new houses to be built on previously developed land : so-called brownfield sites .
到2005年，他希望会有一半的新房子建在以前曾经开发过的所谓棕色地带上。
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The deviation from the previously accepted agreement cannot be forgiven .
违背事先接受的协议是不可原谅的。
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She previously worked as a teacher .
她过去当过教师。
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Six months previously he had quitted his job .
6个月前他辞职了。
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I haven 't met him previously .
我以前没有见过他。
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Previously our mountain area [ region ] is poor and impoverised .
先前咱们山区很穷。
指从现在起往前推算一段时间，通常和一般过去时的动词连用。
He left a moment ago.
他刚走。
There was a pond here three years ago.
3年前，这里有一个池塘。
指过去某时间之前的时间或泛指以前，通常与动词的现在完成时连用，有时也可与动词的过去完成时或一般过去时连用，也可用于具体的一段时间；在间接引语中用 before 而不用 ago。
Have you heard about it before?
你过去听说过这件事吗？
I have never met him before.
我以前从未见过他。
He said that he had met the man somewhere before.
他说他以前在什么地方见过这个人。
He was in Italy the week before.
他前一个星期在意大利。
泛指以前，有时常用于对比。
Formerly, Ted often lingered around a park, with nothing to do.
从前，特德时常在公园里闲逛，无所事事。
He was formerly a worker, but now he is a manager of a shop.
他曾经是个工人，可现在他是一家商店的经理。
与 before 用法相同，但更加正式。
I haven't met him previously.
我以前没有见过他。
She previously worked as a teacher.
她过去当过教师。
Six months previously he had quitted his job.
6个月前他辞职了。