n.尖锐（性，程度），锋利，锐敏度

She shows great keenness in learning new things.
她对学习新事物表现出极大的热情。
His keenness for football has led him to become a professional player.
他对足球的热情使他成为了一名职业球员。
The teacher was impressed by the student's keenness to learn.
老师对学生的学习热情印象深刻。
Her keenness on art is evident from her vast collection of paintings.
她对艺术的热爱从她的大量画作收藏中可见一斑。
He joined the debate team due to his keenness for public speaking.
出于对公开演讲的热爱，他加入了辩论队。
The company values employees who show keenness and initiative in their work.
公司重视在工作中展现出热情和主动性的员工。
Their keenness to help others is truly inspiring.
他们帮助他人的热情真是令人鼓舞。
Despite her age, she still retains her keenness for travel.
尽管年纪大了，她仍然保持着旅行的热情。
The children displayed remarkable keenness during the science experiment.
孩子们在科学实验中表现出了非凡的热情。
His keenness on music began at an early age when he started playing the piano.
他对音乐的热情始于他开始弹钢琴的早期。