No creature gets to take two turns in the same round.

任何生物都不能在一轮中进行两个回合。

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These two parts of the animal take it in turns to act as an anchor, while the other digs further into the sediment.

它的这两个部分轮流充当立足锚点，而另一部分则向沉积物深处挖掘。

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"Normally, I only sleep maybe two hours a night because she wakes up and she wanders and she turns on the stove," says Howard, who eventually had to quit her job to take care of her mother full-time.

“一般来说，我一晚上也许只能睡两个小时觉，因为老妈经常醒来到处徘徊，她有时还把炉子打开，”霍华德说，她最终不得不辞去工作，全职照顾她的妈妈。

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Two teams take turns pushing stones weighing almost twenty kilograms towards a circular target drawn on the ice.

VOA: special.2010.02.10

So we'll start to look at molecules and we'll see if we take two atoms and we fill in our molecular orbital and it turns out that they have more anti-bonding orbitals than bonding, that's -- a diatomic molecule we'll never see.

我们要看开始看一看分子,并且我们会发现如果我们,取两个原子并且填入分子轨道,结果是它们的反键轨道,比成键轨道更多，这就是-一个我们不会看到的二元子分子。

麻省理工公开课 - 化学原理课程节选

Two rangers take turns climbing Helvellyn to measure wind speed and temperature.

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Under that agreement, China will also get to name the new cub and will take custody when it turns two.

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These two parts of the animal take it in turns to act as an anchor, while the other digs further into the sediment.

ECONOMIST: Robots