拍掉或擦掉灰尘的英文：
brush down

brush是什么意思：
n. 刷子；画笔；刷，梳，擦
v. 刷，写，画，拂；擦过，掠过

shifting of brushes
电刷的移位;电刷位移

That sweater is not brushed.
那件毛衣不会起绒。

The brush of a fox.
一只狐狸的毛茸茸的尾巴

I paint with a brush.
我用画笔作画。

She brushed past him.
她和他擦肩而过。

down是什么意思：
prep. 在…下，沿着
v. 下降，打倒
n. 潦倒；羽绒；丘陵

Down with hegemonism!
打倒霸权主义！

The sun is down.
太阳下山了。

Close down autos and you close down steel and rubber.
关掉了汽车工业你也就关掉了钢铁工业和橡胶工业。

nail down; nail in;hold by
钉住;使人遵守诺言

break down resistance
粉碎反抗，制服反抗