The mouse which had been caught was a pitiful specimen; but the cat rejoices even over a lean mouse.
那只被逮住的老鼠是瘦的，但是猫儿，即使得了一只瘦老鼠，也要快乐一场。
Such work has also raised the suggestion that transplanting "lean mouse" microbes to fat mice can make them thinner—for a while.
类似研究也产生这样的看法，将“瘦老鼠”的微生物转移到肥老鼠身上可以让其暂时变瘦。
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