这些协议包括:上学前不用屏幕、晚上不得碰手机、吃饭时不得打电话,等等。
These agreements may include: no screens before school, all mobiles on the landing at night, no calls at meal-times, etc.
他们不得不等到星期一才打电话给银行。
那天晚些时候我本来要拜访你的,但我不得不打电话取消了。
I was coming to visit you later that day, but I had to phone and cancel.
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