n. a necessary or essential thing
n. grape juice before or during fermentation
s. highly recommended
n. 必须, 未发酵葡萄汁, 绝对必要的事物
aux. 必须
1. You must finish your homework before watching TV.
你必须在看电视之前完成作业。
2. She must be very tired after working all day.
她工作了一整天后一定很累。
3. We must arrive at the airport two hours early.
我们必须提前两个小时到达机场。