如果这些动物和植物日渐绝迹,我们再一次将会不再见到他们。
If these animals and plants die out, we will never see them again.
如果这些大型猫科动物灭绝了,那么它们捕食的小型动物将会使森林中物种的密度过高。
If these great cats become extinct, the smaller animals they prey upon will overpopulate the forests.
塑料袋每年会导致10万只海洋动物死亡,因为这些动物误以为它们是食物。所以如果你必须使用它们,一定要回收它们。
Plastic bags cause the deaths of 100,000 marine animals each year because the animals mistake them for food. So if you must use them, always recycle them.
But if you throw off the environment, in this case, the animal's biology, it's drive for certain nutrients is in concert with the food it has access to.
如果让它们换个环境,这种情况下,这些动物的生理特性,即它们有多少动力去获取某些营养元素,是与其食物源状态有关的
It is, of course, important if you use animal testing to treat the animals with as much dignity as possible.
如果要用动物做实验的话,请给予这些动物最大的尊严,我认为一点十分重要。
If you change the animal's environment and you give it access to these sort of foods, and these are the pictures that I showed in the first class, and you remember I asked you what constituents of this diet promoted obesity and you said it was fat, sugar, and variety that was correct.
如果你改变动物所在环境,再给它们这些食物,这些图片我们在第一课见到过,我问过这些食物中哪些成分使人发胖,你们说脂肪,糖和其他成分,没错
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