Don't arrive late for class. You must be on time.
上课不要迟到。你必须准时上课。
I made it a condition that everybody must be on time.
我提出一个条件,人人都要准时。
Ships may be delayed by storms; flights may be cancelled because of bad weather, but trains must be on time.
轮船船期可能因风暴而推延,飞机航班可能因恶劣天气而取消,唯有火车必然是准点的。
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