fool, 傻瓜。hardy, 极其的。

1. It was foolhardy to have refused.

拒绝是极不明智的。

2. It would be foolhardy to sail in weather like this.

这种天气出航就是瞎冒险。

3. He paid for the foolhardy act with his life.

他为鲁莽的举动付出了生命的代价.

4. Look before you leap. Don't be so foolhardy.

做事要瞻前顾后, 不要这样鲁莽.

5. When he tested an early vaccine on himself, some described the act as foolhardy.

当他在自己身上试验还处在初级阶段的疫苗时，有些人说他的行为是蛮干。