1. at stake 处于危险中
The life of the sick man is at stake.
病人已经危在旦夕 。
2. a tract of 一块(土地)
That is a tract of timberland that has been clear-cut.
那是一片被伐光的林地 。
3. the crowds of 一群
The crowds of protesters appeared to be smaller on Wednesday than on previous days.
周三的示威人群看来比前些天规模略小 。
4. stand by 待命
Mechanic will proceed to the fire pumps rooms to stand by and await further instruction.
机械工应在消防水泵房内待命,等候进一步指令 。