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它经历了3个时期.用英语怎么说？

它经历了3个时期.

It covers three epochs.

相关词汇
it covers three epochs

it

pron. 它，他，正好是所需的，事实[情况]；n. <美俚>傻瓜，笨蛋，<俚>绝妙的人，理想的东西，登峰造极；

covers

n. 盖子( cover的名词复数 )，（书等的）封面，（对身分、感情或违法事情的）掩盖，（保险公司的）保险；v. 覆盖( cover的第三人称单数 )，掩护，通过，代替；

three

num. 三，三个，第三（章，页等）；n. 三岁，三个人[东西]，三，三个；adj. 三的，三个的；

epochs

N-COUNT 时代;纪元；N-COUNT （地质中的）世，纪，期；
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
相关例句
You are endeavouring to disarm me by reason.
您正竭力寻找理由来否定我的想法.
Cherny was enrolled at the University in 1945.
彻尼1945年在该大学登记入学。
As the fish snaps at the bait, it gets caught on the hook.
鱼咬饵时, 就被钓在钩上.
The North American continent is made up of three great structural entities.
北美大陆是由三个构造单元组成的.
They can look back on their endeavours with pride.
他们可以骄傲地回首过去付出的努力。
It is right that their murderers should hang.
谋杀他们的凶手就应该被绞死。
The new architecture was needed to accommodate the Crossman's all - wheel drive system and higher ride height.
新的结构,有必要以适应克罗斯曼的全时四 轮驱动 系统和较高的行驶高度.
He could stand no more and engineered an escape.
他无法再忍受，便策划了出逃。
Eels have been on the feed in the Lower Thames.
鳗鱼在泰晤士河下游寻食.
Always the eyes watching you and the voice enveloping you.
那眼睛总是死死盯着你,那声音总是紧紧围着你.
Broadway was full of loafing thespians in search of next season's engagements.
百老汇大街上挤满了闲荡的演员,在寻找下个季度的演出机会.
In Britain women were enfranchised in 1918.
1918年英国妇女获得议会选举权.
The Westminster Abbey entombs many great men.
威斯敏斯特教堂是许多伟人的安葬之所.
A crop of tomatoes enriches the soil and makes it suitable for growing cabbage.
西红柿茬口壮，种白菜挺合适。