Protein supplements, both animal and plant based, are also available.

蛋白质补充剂，无论是动物还是植物的，都是可以的。

Another plan is to breed animals based on how much methane they produce.

另一项计划是根据动物产生的甲烷数量来繁殖动物。

Many animals, including humans, are instinctively pretty good at noticing 3D things – like other animals – based on the way light bounces off them.

许多动物， 包括人类，都本能地非常擅长根据光线从它们身上反射的方式来注意 3D 事物——就像其他动物一样。

In both of these two studies, researchers gave one group of healthy young men animal based proteins, like chicken breast and milk protein, and gave another group of healthy young men plant proteins, like wheat and chickpeas.

在这两项研究中，研究人员给了一组健康的年轻人动物蛋白，比如鸡胸肉和牛奶蛋白，给另一组健康的年轻人植物蛋白，比如小麦和鹰嘴豆。