猪和人类大差不多。

Pigs are roughly the size of human beings.

youdao

哺乳类动物的例子有人类，猪和狗。

Some examples of mammals are man, pigs, and dogs.

youdao

不幸的是变异发生了，这意味着我们寻找的病毒跟流通的其他病毒会改变遗传物质，这可以发生在人类、猪和鸟类上。

And this means that the viruses that we're seeing can exchange genetic material with other viruses that are circulating. This can happen in humans, in pigs, in birds.

youdao