Kk

keen [ki:n].........................CET4 CET6 考研 TOEFL IELTS

形 热心的；敏锐的

参考句型 it is no wonder that...

▶She is interested in studying flowers; it is no wonder that she is keen on growing flowers.

她对研究花很感兴趣，难怪她对种花特别着迷。

knuck·le [ˈnʌkl] .......................CET6 考研

名 关节

动 将指关节打、压；开始认真工作

参考句型 let's / let us...

▶名 Let's help the boy scrape the skin off his knuckles.

我们来帮这个男孩刮掉他指关节上的皮吧。

▶动 Let's have no more talk and knuckle down to work.

别再聊了，我们开始认真工作吧。