coca20000

Keen Ki:N Kin Adj.["厉害的，强烈的","敏锐的，敏捷的","锐利的","热心的 Vi.["（为死者）恸哭，哀号 N.["〈英〉号哭，恸哭

The word 'keen' describes someone who is eager or enthusiastic about something, or something that is sharp or penetrating.

单词 'keen' 形容厉害的、敏锐的或热心的。

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