16 Pay a call 拜访
To visit somebody
Example: As we’re in this neighborhood, we might as well pay the Jacksons a call, we haven’t seen them for ages.
17 By chance 偶然, 意外的
Unexpectedly; with no prior planning
Example: By chance, I bumped into my wife in the shopping mall
18 Round the clock 夜以继日的
To do something continuously, without a break or pause
Example: The ambulance services worked round the clock hauling people trapped in the building to safety.
19 Keep one’s cool 保持冷静
To stay calm in a difficult situation
Example: If the traffic is jamed, the only thing to do is keep your cool, or get out of the car and walk!
20 In a tight corner 处于困境
In an extremely difficult situation
Example: Whenever I get into a tight corner, I try to rely on quick thinking to get out of it.