你好!裤衩underpants 英[ˈʌndəpænts] 美[ˈʌndərpænts] n. 裤衩; (男用) 内裤,衬裤; [例句]While the bath was filling, he padded about in his underpants.往浴缸里放水时,他穿着内裤走来走去。
裤衩应该用“underpants”