He rolled his sleeves up.他挽起了袖子。

the photograph of the conductor on the sleeve唱片套上印着的指挥家照片

I'd been doing some quiet investigating in the meantime and had an ace up my sleeve.与此同时, 我不动声色地展开调查, 掌握了一张王牌。

She thought he had some clever trick up his sleeve.她觉得他自有锦囊妙计。