However, when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock, their behavior became markedly different.

然而，当两只猴子被放置在不同但相邻的房间里，以便让它们观察到对方用石头换来了什么时，它们的行为就变得明显不同了。

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Chinese scientists have successfully cloned two monkeys.

中国科学家成功克隆了两只猴子。

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In a study using monkeys, the experiment was set up so that two monkeys obtained food by cooperating with each other.

有一个用猴子做的研究，实验的设置，使得两只猴子必须互相协作才能取得食物。

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The two monkeys were part of the joint Russian-American Bion 11 mission in 1997, flying aboard the space shuttle.

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In the experiment, two monkeys sat side by side.

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Chen was building on research from Emory University's Yerkes National Primate Research Center, which has been working with capuchins for years because of their strong instincts for cooperation and working in groups (in the wild, they eat large squirrels, which require at least two monkeys to capture).

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