匹夫之勇的英文：
foolhardiness

They were very foolhardy to jump off the bus while it was still moving
公共汽车还未停定他们就跳下了车,真是太莽撞了。

One of the hostages was foolhardy enough to try to wrest the gun from the hijackers hand.
有一个人质莽撞地企图去夺劫机者手中的枪

You were very foolhardy to jump off the bus while it was still moving.
公共汽车还未停定你便跳下车，真是太莽撞了。

They were very foolhardy to jump off the bus while it was still moving.
＂公共汽车还未停定他们就跳下了车，真是太莽撞了。＂

Do they not realize their foolhardiness and which they are tarnishing the Republic's image?
他们难道不知道自己的行为不但愚蠢，也会损害新加坡的形象？