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 bumped¹ 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 hauling² 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.