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關注：1
2013-05-23 12:21
求翻譯：when we work and also when we play we use up energy.the energy may be physicsl or mental or a combination of the two.when our work or play is prolonged ,we become tired and want to stop and test or change to some other activity .if we do not stop,we become gradually less efficient.是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
when we work and also when we play we use up energy.the energy may be physicsl or mental or a combination of the two.when our work or play is prolonged ,we become tired and want to stop and test or change to some other activity .if we do not stop,we become gradually less efficient.
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