"put a cap on something" 对某事设定限制/上限

- to put a limit on something

"The phone company put a cap on the free data that we can use."

这个手机公司对我们可以使用的免费资源做了限制。

"The university put a cap on the number of new students."

这所大学对新生数量有设限。

"The city government put a cap on the amount of taxes that people must pay."

市政府对人们必须支付的税款设定了限制。