为了查明这些记忆是不是永久的失去了，研究者们给了这些老鼠一些药以将酶的数量降低到正常水平。

To find out whether the memory loss was permanent, researchers gave the mice a drug that, in effect, reduced the amount of the enzyme to normal levels.

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开始时，研究小组喂给老鼠一种能作用于激耐力基因的药。

First, the team gave mice a drug that targets a sort of endurance gene.

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所以他们给了老鼠另外一种叫AMP的药，其效果在训练时如同一些天然激素。

So they gave the mice a different drug that mimics a natural chemical produced during exercise, called AMP.

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