讲解：
cross sb / sth off | cross sb / sth off sth
(从名单或清单上)画掉,删掉:
We can cross his name off; he's not coming.
他不来了,我们可以把他的名字画掉了。

be premature
草率的；仓促的:
It is premature to talk about success at this stage.
现阶段就谈成功尚为时过早。

get into a situation
面临情况；状况；形势；局面:
You could get into a situation where you have to decide immediately.
你可能遇上一种情况,使你不得不立刻作出决定。

be trapped
使落入险境；使陷入困境:
They were trapped in the burning building.
他们被困在燃烧着的楼房里。

corner the market
垄断(某种货品的交易):
They've cornered the market in silver.
他们垄断了白银市场。

buzz (for sb / sth)
用蜂鸣器(发信号):
The doctor buzzed for the next patient to come in.
医生按蜂鸣器叫下一个病人进来。