动物 的作用
Some animals are pets, some are wild, and many of them provide us with food. All have a different - and important - role in our lives.
It is easy to forget that the steak at the supermarket once formed part of a steer. But without domestic animals such as chickens and cattle, we would all be vegetarians, or a great deal of our time would need to be spent hunting.
Wild animals attract sport hunters.
