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大約是
英國pants=美國underpants
美國pants=英國trousers
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pants
1 especially American EnglishDCC a piece of clothing that covers you from your waist to your feet and has a separate part for each leg [= trousers British English]
She was wearing dark blue pants and a white sweater.
2 British EnglishDCC a piece of underwear that covers the area between your waist and the top of your legs [= underpants AmE
trousers
especially British English
DCC a piece of clothing that covers the lower half of your body,with a separate part fitting over each leg [= pants American English]