trousers

He wore a pair of formal grey trousers and a matching suit jacket.

(Chinese) 他穿了一条正式的灰色西裤和一件配套的西装外套。

The mechanic's cotton trousers were stained with oil and grease from the engine.

(Chinese) 机械师的棉质长裤上沾满了发动机留下的油渍和油脂。