■ 如果想表达“脱裤子”，则可以说：take off one's pants。
把裤子抖一抖 shake out pants
A：Please shake out the pants before hanging them on the clothesline.
把裤子晾到晒衣绳上之前先抖一抖。
B：Why should I do that?
为什么要那么做呢？
clothesline /?kl??z?la?n/ n. 晾衣绳
◆ shake out 抖动，甩动
弄平裤子上的褶皱 remove the wrinkles from the pants
A：The rain wrinkled my pants. I've done everything possible to remove the wrinkles from the pants, but I failed.
雨水把我的裤子弄得起皱了。我想方设法要把裤子上的褶皱弄平，可是都没用。
B：Why is that so hard? Just iron them.
怎么会那么难？熨一下就可以了。
wrinkle /?r??kl/ n. 褶皱
掸掉裤子上的灰尘 brush the dust from one's pants