mettle /ˈmɛtəl/

• 1. 

  N-UNCOUNT Someone's mettle is their ability to do something well in difficult circumstances. 魄力 [usu poss N]

  例：

  His first important chance to show his mettle came when he opened the new session of the legislature.

  当他主持召开新一届立法会议的时候，让他显示魄力的第一次重要机会来了。