VII. Translation form English into Chinese (15 points) 將下列短文譯成漢語(yǔ)。

　　When we work—and also when we play—we use up energy. The energy may be physical or mental or a combination of the two.

　　When our work or play is prolonged, we become tired and want to stop and rest or change to some other activity. If we do not stop, we become gradually less efficient.

　　If we set someone at a job and keep him at it continuously without rest, ultimately he will break down and be unable to go on.

　　If rest intervals or changes of activity are introduced, the person will be able to work for a much longer period of time.

　　Efficiency, then, seems to be mainly a matter of the distribution of work and rest periods. In ordinary life, we work during the day, and sleep at night, year in and year out.