He has on his jeans and a long-sleeved blue denim shirt with a white T-shirt underneath.

他身穿牛仔裤和一件蓝色长袖粗斜纹棉布衬衫，里面还有件白色T恤衫。

《柯林斯英汉双解大词典》

It's my T-shirt. Please pass me my T-shirt.

我的体恤衫。请把体恤衫给我。

youdao

Great body too, she observed, in a dark suit. Beneath it he wore a black T-shirt, not a white polyester shirt and stodgy tie you saw so often in this area.

他来了，英俊、秃顶的男子，她注意到，他身材也很好，穿一件深色西装，里面穿了件黑色T恤，而不是在本地经常看见涤纶衬衫和古板的领带。

youdao

"So wearing a t-shirt with Che Guevara doesn't mean that I am communist, but it means that I am trendy.

VOA: standard.2009.12.16

I love this T-shirt-- what?

我喜欢这件衬衫，什么？

哈佛公开课 - 幸福课课程节选

As you would say, it's like pair of skinny jeans, a pair of brogues, I don't know, a T-shirt,

这打扮就是一条紧身牛仔裤，一双皮鞋，大概还有一件T恤，

街头时尚的精髓 - SpeakingMax英语口语达人

In the District of Columbia for example, if you came in with a campaign T-shirt, you would be asked to cover it up, that means some people have had to turn the T-shirt inside out.

NPR: Can Your Clothes Keep You From Voting On Election Day?

So you know, when you can say it's OK to come in with a campaign button or a t-shirt, you know somebody is going to be in a polling place trying to hand out literature, trying to talk to people about why they're wearing that t-shirt and trying to promote their candidate.

NPR: Can Your Clothes Keep You From Voting On Election Day?

You could go on full office mode and wear one with a white shirt and a horizontal striped tie and monk straps or you can keep it casual by wearing a T-shirt instead a dress shirt.

FORBES: How To Find The Perfect Summer Suit