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。











