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周期摄动用英语怎么说？

periodic perturbations

周期摄动

相关词汇
periodic perturbations
periodicadj. 周期的，定期的，回归的，间歇的，时而发生的；
例句
There may be periodic police 'sweeps' of crime in the area.
警方可能对该地区的犯罪活动进行定时的“扫荡”。
perturbationsn. <正>忧虑( perturbation的名词复数 )，不安，烦恼，<术>摄动；
相关好句
There was no occasion to do so.
没有理由这样做。
They got on at this station.
他们是在这个站上的车。
He secretly hoped that fate would intervene and save him having to meet her.
他暗自希望命运帮他一把，别让他碰见她。
Put in your starting disk and boot the computer by pressing Control.
放入启动盘，按控制键启动计算机。
A home isn’t just bricks and mortar.
家不仅仅是一所房子。
Every actor ought to know his lines backwards before he goes on stage,as nervousness may make him forgetful.
所有演员在上台前都应当把台词记得滚瓜烂熟,因为一紧张就容易忘词。
The cat moved on silent feet.
那只猫无声地走动着。
I would question the validity of that assumption.
我会质疑那个假设的正当性。
Could you spare some time to come to our art exhibition?
你能抽出时间来看看我们的画展吗?
Smith's report was not officially okayed by the War Department for Release until July 9.
史密斯的报告于7月9日才获得释放战俘处正式批准。