keenness

名词 keenness:

1. a quick and penetrating intelligence
   同义词：acuteness, acuity, sharpness
2. a positive feeling of wanting to push ahead with something
   同义词：eagerness, avidity, avidness
3. thinness of edge or fineness of point
   同义词：sharpness

1. The scabbard is content to be dull when it protects the keenness of the sword.
   刀鞘保护刀的锋利，它自己则满足于它的迟钝。
2. The general's speech infused keenness into the men.
   将军的演讲给人们注入了激情。