1. The farmer sets traps to catch the rats.
    农民放置了许多捕鼠器捕捉老鼠。

2. The warehouse is infested with rats.
    这个仓库里老鼠横行。

3. His studies with rats have demonstrated two primary effects of activity: vigorous physical exercise provides the brain with more fuel, and skill-based exercise increases the formation of connections in the brain, which, according to the proposals of
    他对老鼠的研究已经表明运动具有两大功效：强力体育运动给大脑提供更多的燃料，而技巧性的运动则增强大脑神经的联结。依照某些科学家的见解，这种联结能使大脑更好地处理信息。

4. And while animals aren't people, he says it is logical to make the inference that an effect found in rats may also apply to humans.
    他说尽管动物不是人，但依此推断在老鼠身上发现的功效同样适用于人也合乎逻辑。

5. Young brains may be especially able to boost brain power through exercise, suggested another of Greenough's experiments that showed the most significant changes in the brain occurred among rats that had been exercised when very young.
    据格里诺的另一组实验显示，年轻的大脑尤其能够通过运动来增强能力。这组实验表明，从小就锻炼的老鼠，其大脑的变化最为显著。

6. But for use against prey such as rats and mice,
    而是对付它的猎物，诸如鼠类，

7. No running fights with large, fierce rats or tussles with grown rabbits
    它就不必再和又大又凶的老鼠边跑边博斗了，也不必再和大兔子扭斗了，

8. In one experiment, laboratory rats were separated into three groups.
    在一个实验中，实验鼠被分成三组：