- We must keep an vigilant eye upon imperialism.
我们必须对帝国主义保持警戒。
- You must learn to take the bad with the good.
人必须学会好坏都能承受。
- You're very full of yourself today, I must say.
你今天太自以为是了,我不得不说出来。
- We must conquer a solid foundation for industry.
我们不得不为工业打下一个坚实基础。