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1·Between 1981 and 1997, detailed time-use studies showed that the time children spent at play declined by 25 percent.

从1981年到1997年，详尽的时间使用研究表明，孩子们花在玩耍上的时间减少了25%。

2·Only those species with ways of spreading to these islands were able to undertake the long journeys, and the various factors at play resulted in diverse combinations of new colonists on the islands.

只有那些有办法传播到这些岛屿的物种才能进行长途旅行，各种因素在起作用，导致岛上新殖民者的多样化组合。

3·On these magic shores, children at play are for ever beaching their coracles.

在这些神奇的海岸上，玩耍的孩子不停把他们的小圆船拖到岸边。

4·Unlucky in love, lucky at play.

情场失意，赌场得意。《新英汉大辞典》

5·There were other factors at play.

还有其他因素在起作用。

6·But other factors are also at play.

但是其他因素也在起作用。

7·This, again, is greed at play.

这又是贪婪在作祟。

8·There are a number of factors at play.

有许多因素在发挥作用。

9·There may be other factors at play, too.

可能也有其他的因素在起作用。

10·There are POWERFUL causes at play here.

这便是这场游戏的强大动因。