adj.敏锐的;强烈的;锋利的;热衷的;精明的
Their keen eyes can penetrate the water to a depth of forty feet. 他们锐利的眼睛能透过水面看到40 英尺的深处。
Be brave, a fence between makes love more keen. 勇敢点,受到阻隔的爱情会更强烈。
The razor has a very keen edge. 这把剃刀有锋利的口。
They have a wide knowledge of everyday things, and a keen interest in their particular city and state. 他们对日常事情所知甚广,对所在的城市和州深为关切。
He's keen, but his youth is a minus factor. 他非常精明, 但他的年轻却是个不利的因素。
keen的基本意思指具有锋利边缘的,即“锋利的”,指风时作“刺骨的”解; 指味道时,作“刺鼻的”解; 指批评等时,作“尖刻的,尖锐的”解; 指人、性格等时,作“热心的,渴望的”解; 指兴趣、情感等时,作“强烈的,深刻的,激烈的”解; keen指心智、感官等时,作“敏捷的,敏锐的”解。
keen用作表语时,后面可接介词短语,动词不定式或that从句,从句中谓语动词常为虚拟语气。