keenadj.敏锐的；强烈的；锋利的；热衷的；精明的keene's cement外延的投资,广阔的投资keen-sightedadj.目光敏锐的keen sportsman比赛积极的运动员keen sensation痛感Keenania flavan.黄溪楠keen affection深切的爱keenly realize敏锐地认识到keen of hearing听力敏锐keen as mustardadj.极热心的keen observation敏锐的观察力