(noun.) not wearing a jacket; 'in your shirtsleeves' means you are not wearing anything over your shirt; 'in hot weather they dined in their shirtsleeves'.
安娜贝拉录入
双语例句
Other cities put on their best clothes in summer, but New York seems to sit in its shirtsleeves. 伊迪丝·华顿.快乐之家.