- 释义：
- n.敏锐
- 例句：
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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。
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This hard work has drained away my keenness.
这种艰苦的工作削弱了我的锐气。
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His headache had departed; his every sense seemed to have gained keenness.
他头不疼了, 于是他的每个感官又恢复了敏锐.
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