1 ADJ-GRADED [usually ADJ n] (眼神、表情或话语)会意的,心照不宣的 A sly look, expression, or remark shows that you know something that other people do not know or that was meant to be a secret. (眼神、表情或话语)会意的,心照不宣的
SYN roguish, knowing, arch, teasing
slyly -
Anna grinned slyly.
安娜会意地咧嘴笑了。
2 ADJ-GRADED 狡猾的;诡诈的 If you describe someone as sly, you disapprove of them because they keep their feelings or intentions hidden and are clever at deceiving people. 狡猾的;诡诈的 [disapproval]
SYN cunning, scheming, devious, secret
3 PHRASE [PHRASE after verb] 偷偷地 To do something on the sly means to do it secretly, often because it is wrong or bad. 偷偷地 [informal]
SYN secretly, privately, covertly, surreptitiously
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