- (British English)
underpants or knickers 内裤；短裤 a pair of pants 一件内裤
Oxford Collocations Dictionary… of pants- pair
- pull on
- pull up
- drop
- …
- bra and pants
- (especially North American English)
trousers 裤子 
a new pair of pants 一条新裤子 ski/sweat/dress pants 滑雪/运动/服装裤 a brown vest with matching pants 棕色的背心与配套的裤子 I start patting at my pants pockets. 我开始拍我的裤子口袋。 She rolled up her pant legs. 她卷起裤腿。 She wore a pair of baggy khaki pants and a black t-shirt. 她穿着一条宽松的卡其布裤子和一件黑色t恤。
Oxford Collocations Dictionaryadjective- long
- short
- corduroy
- …
- pair
- unbutton
- undo
- unzip
- …
- leg
- suit
- …
- in pants
- (British English, slang)
(also used as an adjective 也用作形容词 something you think is of poor quality 次品；劣质品
Word Originmid 19th cent.: abbreviation of pantaloons.
Idioms
bore, scare, etc. the pants off somebody
- (informal)
to make somebody extremely bored, frightened, etc. 把…烦死（或吓死等）
(fly) by the seat of your pants
- (informal)
to act without careful thought and without a plan that you have made in advance, hoping that you will be lucky and be successful 临时凭感觉碰运气；凭经验瞎碰
catch somebody with their pants down
(British English also catch somebody with their trousers down)
- (informal)
to arrive or do something when somebody is not expecting it and not ready, especially when they are in an embarrassing situation 使突陷窘境；乘人措手不及；出其不意；冷不防
have ants in your pants
- (informal)
to be very excited or impatient about something and unable to stay still 焦躁不安；坐立不安
wear the pants (North American English)
(British English wear the trousers)
- (often disapproving)
(especially of a woman 尤指女人 to be the person in a marriage or other relationship who makes most of the decisions （在婚姻等关系中）处于支配的位置，起指挥的作用 It's obvious who wears the pants in that family! 那家谁当家显而易见！
wet your pants/knickers
(also wet yourself)
- [no passive]
to urinate in your underwear by accident 尿裤子 He was so frightened that he wet his pants. 他害怕得尿湿了裤子。