名詞 waistcoat:

1. a man's sleeveless garment worn underneath a coat
   同義詞：vest

1. His waistcoat is beneath his coat.
   他的背心穿在外套里面。
2. A waistcoat; a vest.
   緊身背心; 馬甲
3. Her waistcoat is beautiful.
   她的馬甲很漂亮。
4. I always wear a waistcoat.
   我經(jīng)常穿著一件馬甲。

waist.coat

n.（名詞）
A garment formerly worn by men under a doublet.
背心：以前男人穿在緊身衣里面的衣服
Chiefly British A short, sleeveless, collarless garment worn especially over a shirt and often under a suit jacket; a vest.
【多用于英國】 馬甲：一種短的無袖無領(lǐng)衣服，尤其是穿在襯衫外面夾克裝里面的；背心

【引伸】
waist.coat.ed
adj.（形容詞）