mettle

Your inner mettle may not be easily altered, but with the right tool kit, some aspects of personality may be works in progress.

你内心的气质也许不会轻易改变，然而如果有了一些正确的方法，一些个性将会不经意间地改变。

But as the crowd roared for the Italian, Li showed her mettle and held firm.

然而，当观众为意大利人呐喊时，李娜展现了她的勇气，稳住了阵脚。

My Side of the Mountain, by Jean Craighead George. This is a story about a boy who decides to live in the woods, to test his mettle and do something different.

珍·克雷黑德·乔治所写的《山居岁月》——故事所写的是一个男孩决定住在丛林里来测试他的勇气，做些不同凡响的事情。