If you keep rodents in a very rich environment, with lots of toys.
如果你把啮齿类动物放在一个有许多玩具的丰富环境。
You will need lots of toys which you can rotate for the puppies.
你需要为它们准备大量的可重复使用的玩具。
He buys lots of toys for his child and he never quarrels with his wife.
他给他的孩子买很多玩具，而且他从不与妻子吵架。