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1·Researchers took a group of teenagers who had never smoked and for one year tracked whether they took up smoking and how their mental health changed.

研究人员找来一组从不吸烟的青少年，用一年的时间追踪他们是否开始吸烟以及他们的心理健康如何变化。

2·You got the chance to experience life in China for one year.

你有机会在中国体验一年生活。

3·A long-time neighbor said they never planted trees and only kept a garden for one year.

一位多年的邻居说，他们从不种树，只打理了一年的花园。

4·I served as monitor for one year.

我当过一年的班长。

5·These will be valid for one year.

这个帐号的有效期为1年。

6·Environment needed for one year on average.

环境平均需要为1年。

7·B: I worked as a PR clerk for one year.

我做过一年公关职员，三年公关部经理。

8·S. economy has been in recession for one year.

美国经济陷入衰退已经一年。

9·The thief was put into prison for one year.

小偷被监禁一年。

10·This is not just for one year, but for five years.

这不是一年的任务，而是五年的任务。