adj.机智敏锐的；伶俐的
His keen wit flashes out occasionally. 他的机智不时闪露出来。
I'm very keen on outdoor sports. 我非常喜欢室外运动。
I can not deny my keen anticipation of her visit. 我不能否认我热切期待她的来访。
I'm not all that keen on baseball. 我根本就不喜欢棒球。
He's very keen to see his home town. 他极渴望看到他的故乡。
A person regarded as ungainly or dull witted. 愚笨的人被认为是笨拙的或弱智的人
