除去架子上的灰尘

continental shelves───n.[海洋]大陆架

changing the sheets───换床单

ring the changes───以不同的变奏敲出同一曲调

shooting the chutes───射击斜槽

to ring the changes───按响更改

bursting at the seams───挤满

completing the squares───完成方程

He was on a ladder, dusting off the shelves.───他站在梯子上打扫架子。

• dusting powder
• dusting the shelves
• dusting pads
• dusting is a chore that