I'm sure she's keeping something back from us.
我肯定她有什么事瞞著我們。
Some teachers find it difficult to keep their classes in order.
有些教師覺得難以維持課堂秩序。
Keep down! You mustn't let anyone see you.
蹲下！一定不要讓人看見你。
I keep thinking back to the day I arrived here.
我不斷回想起剛到這兒那一天的情景。
Keep that dog out of my study!
別讓那狗進我的書房！