period of time

基本解釋

If you are getting less back than you put in over a considerable period of time, back off.
如果你在相當(dāng)長的一段時間內(nèi)獲得的回報比投入少，那么，趕緊撤退。
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.
盡管這個問題現(xiàn)在看上去還控制得很好，而在一段時間以前，他還不知道情況是否能在控制中，我的病人告訴我他自己現(xiàn)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.
通過使用該規(guī)范定義的一些方法，資源實例的任何客戶端都可以在一段特定的時間內(nèi)建立和重新開始它們與資源實例的關(guān)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.
它逐漸滲入到其它學(xué)科,總之是那個時代的一匹黑馬。
耶魯公開課 - 文學(xué)理論導(dǎo)論課程節(jié)選
There was a period of time in which, although there were decent, chess-playing programs couldn't beat the best chess-playing humans.
盡管曾一度出現(xiàn)過,強(qiáng)勁的象棋程序,無法戰(zhàn)勝頂級人類棋手的情形
耶魯公開課 - 死亡課程節(jié)選

There was a period of time when there wasn't much emphasis put on antibiotics.
NPR: Tracking a New Strain of Drug-Resistant Staph