1.keep up with the times 跟上时代
例句：She is too conservative to keep up with the times.
她太守旧出法跟不上时期。
2.kick up one's heels 轻松愉快一阵,庆祝
例句：He plans to kick up his heels when he finishes his work.
他计划工作完成后要放松一下自己。
3.kill time 消磨时间,打发时间
例句：Why do you kill time every day?
你为何每天都消磨时间？
4.kind of 有点儿,有几分，相当，可以这么说
例句：The bat judges distances by a kind of echo-location.
蝙蝠用一种回声测定法来判断距离。
5.knit together 使紧密地结合,使团结起来
例句：We and the world are knit together by Einstein's thinking in ways that astonish me.
通过爱因思维的思维，我们和世界是编织在一起的，这让我大吃一惊。
6.knock it off (常用以制止喧哗、骚乱、殴斗、争 论、哄笑等)住手，别胡闹,住嘴，别说笑了
例句：In China, they knock it off, but still let you sell at there.
在中国，虽然依旧有山寨，但他们仍然准你销售。