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1·Smoking a lot of cigarettes can harm and even kill over a long period of time.

长期大量吸烟会危害身体健康，甚至导致死亡。

2·Trackers, which are ongoing projects that look at trends or customer satisfaction over a long period of time.

一个正在进行的项目——“追踪者”，在研究很长一段时期内的趋势或客户满意度。

3·The pots were porous so that, although they could carry water in them, it wasn't possible to store it over a long period.

这些罐子有很多孔，因此，虽然它们可以携带水，但不能长期储存水。

4·Diabetes is caused by a group of metabolic disorders in which there are high blood sugar levels over a long period of time.

糖尿病是由一组代谢紊乱引起的，代谢紊乱后，血糖水平长期偏高。

5·This crisis might last for a long period of time.

此次危机可能会持续很长一段时间。《柯林斯英汉双解大词典》

6·She died after a long period of increasing frailty.

她日益虚弱，经过一段长时间后去世了。《柯林斯英汉双解大词典》

7·There followed a long period of confusion and muddle.

接下来是很长一段时间的困惑和混乱。《牛津词典》

8·She returned to work after a long period of incapacity.

她病了很长一段时间之后回去工作了。《牛津词典》

9·Be sure to do some eye exercises to relax your eyes after you study for a long period of time.

在长时间学习后，一定要做眼保健操来放松眼睛。

10·In fact, there is another type of friend—one that has not been with us for a long period of time, but fills our mind at some moment.

事实上，还有另一种朋友，他虽然很长一段时间没有和我们在一起，但却会在某个时刻充满我们的心灵。