他身上的所有斗志似乎都已丧失殆尽。

All the fight seemed to go out of him.

《牛津词典》

他们尽管多次失败，但仍然斗志昂扬。

In spite of many defeats, they still had plenty of fight left in them.

《牛津词典》

我认为我们斗志昂扬。

I thought that we had a lot of fight in us.

《柯林斯英汉双解大词典》

Here are humans who had to walk long distances potentially to find the food, kill the food at great risk to themselves; inspiring a cascade of physiological effects that have to do with fear and arousal and things like that, not to mention all the calories one would burn doing this kind of activity.

这些人可能需要走很远的路,去寻找食物,冒着巨大危险,杀死猎物,人们耗费能量以激活一系列生理效应,用以战胜恐惧,引发斗志,更不用说人们在狩猎的过程中,消耗的卡路里量了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选