be upon on ones mettle

• adj. 奋发(鼓起勇气)

be upon on ones mettle的用法和样例：

例句

用作形容词 (adj.)

1. I hope she will be cheered and strengthened with aid from this side of the Atlantic.
   我希望她会从大西洋此岸得到支持，使她精神奋发，坚强有力。
2. There remain many courageous individuals, but they have no determining influence on public life.
   当然，仍有许多勇敢奋发的个人，但他们对社会生活没有决定性影响。