period of time

基本解释

If you are getting less back than you put in over a considerable period of time, back off.
如果你在相当长的一段时间内获得的回报比投入少，那么，赶紧撤退。
Though it now seems well-controlled, for a period of time before he knew whether or not it would be, my patient told me he found himself in great need of comfort.
尽管这个问题现在看上去还控制得很好，而在一段时间以前，他还不知道情况是否能在控制中，我的病人告诉我他自己现在非常需要安慰。
This specification defines the means by which any client of a resource instance can establish and renew its interest in the resource instance for a specific period of time.
通过使用该规范定义的一些方法，资源实例的任何客户端都可以在一段特定的时间内建立和重新开始它们与资源实例的关系。

Medical experts say small amounts of carbon monoxide over a long period of time can greatly harm an unborn baby.
It began to infiltrate other disciplines and was in general a high-spirited horse for that certain period of time.
它逐渐渗入到其它学科,总之是那个时代的一匹黑马。
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There was a period of time in which, although there were decent, chess-playing programs couldn't beat the best chess-playing humans.
尽管曾一度出现过,强劲的象棋程序,无法战胜顶级人类棋手的情形
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There was a period of time when there wasn't much emphasis put on antibiotics.
NPR: Tracking a New Strain of Drug-Resistant Staph