1.broom指扫地用的长柄“扫帚”,是可数名词,可用冠词修饰。
2.broom用于比喻时可作“新人上任”解。

She sweeps the room with a broom.她拿着扫帚打扫房间。
Use a broom to sweep the leaves from the path!用扫帚把路上的东西扫干净!
A new broom sweeps clean.扫帚新，扫得净。
The new director has changed many of the department rules.A new broom sweeps clean.新主任更改了这个部的很多规定。真是新官上任三把火!

［词源］  ＜古英语brom(灌木)