The Toad saw at once how wrongly and foolishly he had acted.

托德立刻明白他的行为是多么错误和愚蠢。

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It is not at all likely that he will act so foolishly as that.

他决不会那样愚蠢地行事。

《新英汉大辞典》

He admitted that he had acted foolishly.

他承认自己做得很愚蠢。

《柯林斯英汉双解大词典》

Once again the hen walked down the main street,cackling foolishly.

VOA: special.2009.11.14

Let's assume that you've won the lottery, and have serious money that you foolishly wish to invest in the stock market There are two basic strategies to choose from in investing.

让我们假设你赢了彩票，然后又一大笔钱,而你很傻的想要投资到股票中去,有两个投资策略,可以选择。

麻省理工公开课 - 计算机科学及编程导论课程节选

He foolishly got involved with a woman who, along with her husband, turned out to be a blackmailer.

FORBES: Fact and Comment

Hesse recently foolishly compared himself to Brad Pitt in Moneyball at a recent analyst meeting.

FORBES: No Mention of LightSquared, Clearwire Gets a Boost in the Sprint Debt Offering News

Even so, countries such as Ecuador have impulsively and foolishly banned imports of U.S. pork products.

CNN: Commentary: It's time to end flu hysteria