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。