leg

noun [具体名词]腿；动物腿，腿肉；裤腿；家具的腿，支撑柱条；（旅程或赛程的）一段，一程；<非正式>（球，尤指高尔夫球）力度不够；<非正式>（产品或想法的）持久流行或成功；（板球）腿侧区；叉状物的一分支；<古>屈膝礼

The legs of a pair of trousers are the parts that cover your legs.
裤腿•  He moved on through wet grass that soaked the legs of his trousers. 他继续走在湿漉漉的草地上，弄湿了他的裤腿。