The engineered animals, however, did not show fear when they were placed in the cage or heard the tone, a sign that they did not remember that those things meant a shock was coming.

然而经过改造的老鼠被放到笼子里或听到声调并没有显示出害怕，这是一个表明他们不记得那些事情意味着电击会来的信号。

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The engineered animals, however, did not show fear when they were placed in the cage or heard the tone, a sign that they did not remember that those things meant a shock was coming.

然而经过改造的老鼠被放到笼子里或听到声调并没有显示出害怕，这是一个表明他们不记得那些事情意味着电击会来的信号。

youdao