mettle
- n. 勇气；气质；耐力
词组搭配
be on one's mettle
be ready or forced to prove one's ability to cope well with a demanding situation
奋发，鼓起勇气
put someone on their mettle
(of a demanding situation) test someone's ability to face difficulties
（严峻形势）使奋发，激励某人战胜困难
on (one's) mettle
Prepared to accept a challenge and do one's best.
奋发：准备接受挑战并尽最大努力