1. (眼神、表情或話(huà)語(yǔ))會(huì )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.
e.g. His lips were spread in a sly smile... 他心照不宣地咧嘴一笑。 e.g. He gave me a sly, meaningful look. 他心照不宣地看了我一眼，意味深長(cháng)。
slyly Anna grinned slyly. 安娜會(huì )意地咧嘴笑了。
2. 狡猾的;詭詐的 If you describe someone as sly, you disapprove of them because they keep their feelings or intentions hidden and are clever at deceiving people.
e.g. She is devious and sly and manipulative... 她陰險狡詐，會(huì )玩人。 e.g. He's a sly old beggar if ever there was one. 他確確實(shí)實(shí)是個(gè)老奸巨猾的家伙。
3. 偷偷地 To do something on the sly means to do it secretly, often because it is wrong or bad.
e.g. Was she meeting some guy on the sly? 她是不是偷偷地在見(jiàn)什么人？
sly英英釋義
sly
adj
1. marked by skill in deception
e.g. cunning men often pass for wise deep political machinations a foxy scheme a slick evasive answer sly as a fox tricky Dick a wily old attorney