This is the kind of fortitude we must have.

就是要有这股狠劲。

《新英汉大辞典》

Failure is the last test of fortitude.

失败是坚韧的最后考验。

youdao

Failure eis the last test of fortitude.

失败是坚韧的最后考验。

youdao

So that's very sad, that part of his art was very very sad. But I still, I feel pathetic as I say in the last pages or so, but I never lost admire of his fortitude in going on and doing as much as he did.

这太令人伤感了,他的艺术也是很伤感的，我在书里最后几页表示了对他的同情，但是我,从来没有停止崇敬他,坚持不懈地做了这么多的精神。

麻省理工公开课 - 电影哲学课程节选

For all his research, Shayne is the first to admit that value investing particularly now takes plenty of fortitude.

FORBES: Where The Cheap Stocks Are---Come Hell Or High Water

Buster Keaton went deadpan, altering his expression with only the tiniest of inflections, and became a modernist icon of fortitude.

NEWYORKER: The Artists

While I acknowledge that nearly all athletes at an elite level have a tremendous amount of drive, wrestlers in particular seem to operate at a higher level of fortitude.

FORBES: Why Wrestlers Make the Best Employees