他的裤子松了，因为他的腰围最近缩小了两英寸。

His pants are loose because his ___waistline has shrunk by two inches recently.

这条裙子的腰线设计得很高，显得腿更长。

The skirt has a high ___waistline that makes the legs appear longer.

她开始锻炼，希望缩小腰围。

She started exercising to reduce her ___waistline.