set a limit to

例句：

1. 1.We need to set a limit on theamount of time we spend on our phones.
   我们需要对玩手机的时间设定一个限制。
2. 2. Thecompany has set a limit on the numberof employees it can hire.
   该公司已经对可以雇佣的员工数量设定了一个限制。
3. 3. Thegovernment has set a limit on the amountof plastic waste that can be thrown away.
   政府已经对可以丢弃的塑料垃圾量设定了一个限制。