A man's three-piece suit includes a jacket, trousers, and a waistcoat.
男人的三件套服装包括上衣、长裤和背心。
A tree-piece suit consists of trousers, jacket and waistcoat. MADE IN CHINA.
也是三件套西装（裤子、上衣和背心）之中的礼服背心。
If being a toastmaster, the usual dress would be crimson tails with a white waistcoat, and evening - suit trousers.
主持人通常穿深红色燕尾服配白色的马甲，加上一条晚装用的长裤。
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