He was lurking slyly in the background.
他狡猾地躲在背後活动。

After heard these words, they open their mouths slyly and barely at once and thanked me gladly. They expressed good wishes to me and hoped me keep the inspirations too.
他听了马上咧开嘴，很高兴地谢谢我，也祝我常有灵感。

Political candidates sometimes slyly play the race card, but rarely overtly.
政治候选人有时候会狡猾的打种族牌，但是很少公开的这样。

Yet, it was a great delight slyly to precipitate a flight amongst his mates and tangle the traces.
它在同伴之间跳起跃下以扰乱其踪迹, 很是狡猾。

She smiles slyly.
她俏皮的笑笑。

He glanced at her slyly.
他诡秘地朝她瞥了一眼。

She ran slyly through the wall.
她偷偷地穿过那堵墙。

She is whispering slyly to her neighbor.
她密向邻座的人耳语。