keenness

例句:

• His bright blue eye...shone with uncommon keenness and splendour.
  来自Sir W. Scott
• His speech fired the people with keenness for the plan.
  他的发言引起了人们对这个计划的强烈兴趣.
  
• This hard work has drained away my keenness.
  这种艰苦的工作削弱了我的锐气.
  
• A good teacher should be able to infect his students with his own keenness for his subject.
  一个好教师应能以自己对本学科的热爱来影响学生.
  
• Keenness is good, but efficiency and effectiveness are better.
  来自THETIMES
• What has been different is the apparent keenness to take on questions from around the world.
  来自BBC