1.cleaning up 清洁

例句:This room needs cleaning up.
这房间需要打扫。

2.nuclear power 核武器

例句:Japan has announced plans for a sharp rise in its nuclear power generation.
日本宣布了大幅增加核能发电的计划。

3.air conditioner 空调

例句:The air conditioner of my room is not working.
我房间的空调无法正常运行了。

4.block off 阻挡

例句:They had blocked off the fireplaces to stop draughts.
他们已经封住了壁炉，以阻挡通风。