她上楼并换了件宽松运动短裤和T恤。

She went upstairs and changed into shorts and a T-shirt.

youdao

大家都穿休闲装，或短裤、或褪色牛仔裤、或宽松的运动衫。

Everyone dressed informally in shorts or faded jeans, and baggy sweatshirts.

《柯林斯英汉双解大词典》