1.keep up with the times 跟上時代
例句：She is too conservative to keep up with the times.
她太守舊出法跟不上時期。
2.kick up one's heels 輕松愉快一陣,慶祝
例句：He plans to kick up his heels when he finishes his work.
他計劃工作完成后要放松一下自己。
3.kill time 消磨時間,打發時間
例句：Why do you kill time every day?
你為何每天都消磨時間？
4.kind of 有點兒,有幾分，相當，可以這么說
例句：The bat judges distances by a kind of echo-location.
蝙蝠用一種回聲測定法來判斷距離。
5.knit together 使緊密地結合,使團結起來
例句：We and the world are knit together by Einstein's thinking in ways that astonish me.
通過愛因思維的思維，我們和世界是編織在一起的，這讓我大吃一驚。
6.knock it off (常用以制止喧嘩、騷亂、毆斗、爭 論、哄笑等)住手，別胡鬧,住嘴，別說笑了
例句：In China, they knock it off, but still let you sell at there.
在中國，雖然依舊有山寨，但他們仍然準你銷售。