Translation of "have sth up your sleeve" - English-Mandarin Chinese dictionary

have sth up your sleeve

informal

to have secret plans or ideas

暗中留有一招;藏有锦囊妙计
If I know Mark he'll have one or two tricks up his sleeve. 如果说我还算了解马克,我知道他总会留着一两招。

(Translation of “have sth up your sleeve” from the Cambridge English-Chinese (Simplified) Dictionary © Cambridge University Press)