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1·The problem, Schweitzer says, is the actual trades were not profitable.

施韦策表示，问题在于，实际交易是无利可图的。

2·It is probable that the nocturnal trades a way back in the ancestry of all mammals.

这种夜间的“交易”也许可以一直追溯到所有哺乳动物的祖先身上。

3·Given that there is a living to be made at night, and given that alternative daytime trades are thoroughly occupied, natural selection has favoured bats that make a go of the night-hunting trade.

考虑到夜晚也可以生存，并且可供选择的白天的“交易”完全被占用，它们自然选择偏爱那些成功在夜间进行捕食“交易”的蝙蝠。

4·Of all the trades in the world, there is only one that really suits me.

世界上所有的行业中，只有一个真正适合我。

5·When the recovery began, worker shortages first appeared in the high-skilled trades.

当经济开始复苏时，劳动者短缺首先出现在了高技能行业。

6·Accordingly, newspapers were read almost only by rich people in politics or the trades.

因此，几乎只有政界或商界的富人读报纸。

7·As master craft workers, they imparted the knowledge of their trades to apprentices and journeymen.

作为手艺大师，他们把他们行业的知识传授给学徒和学徒期满的职工。

8·In The Little Mermaid, Ariel literally trades in her voice for the chance that a prince she's never met will love her in return.

在《小美人鱼》中，Ariel 用自己的声音换取了一个从未谋面的王子爱她的机会。

9·The group is now unafraid of the occasional tempo shift, and on some songs, drummer Will Champion even trades in his brushes for real live drumsticks!

这个乐队现在已经不再害怕偶尔的节奏变化，在一些歌曲里面，鼓手 Will Champion 甚至把他的电子刷换成真实的鼓槌！

10·There are two trades in this cycle.

本次循环有两种交易。

(1)trades union（英）工会（等于labor union）