n.贴身内衣，汗衫，背心

原形：undershirt复数：undershirts

He put on an undershirt under his dress shirt.
他穿了一件背心在衬衫里面。
The undershirt was drenched in sweat after the workout.
健身后，背心被汗水湿透了。
She removed her undershirt and hung it up to dry.
她脱下背心挂起来晾干。
The boy rolled up the sleeves of his undershirt.
男孩卷起了背心的袖子。
I need to buy some new undershirts; mine are all worn out.
我需要买些新的背心，我的都磨破了。
She noticed a small hole in the fabric of his undershirt.
她注意到他的背心里有一个小洞。
He always wears an undershirt for added warmth during winter.
冬天时，他总是穿一件背心以增加保暖。
His undershirt was visible through the gaps in his torn shirt.
他的背心透过破洞衬衫露了出来。
The undershirt provided a layer of protection against the scratchy wool sweater.
背心为他提供了对抗羊毛衫刺痒的一层保护。
She tucked her undershirt into her pants to keep it from bunching up.
她把背心塞进裤子里，以免鼓起来。