If you act foolishly, people there might think that all of your countrymen are foolish as well.

如果你做傻事，那里的人可能认为你所有的同胞都很愚蠢。

youdao

Saying that there're no easy answers sounds wise, but it's actually foolish: our unemployment crisis could be cured very quickly if we had the intellectual clarity and political will to act.

说没有简单的答案听起来很明智，但实际上是愚蠢的：如果我们有清醒的理智和政治意愿来采取行动的话，我们的失业危机可以很快得到解决。

youdao

An adult can sometimes act as foolish as a little child.

大人有时也会像小孩那样愚蠢行事。

youdao

Men did not see his act as foolish or overly-dramatic.

VOA: special.2010.09.16

Each of us spoke of our initiation, and we established with some surprise that we had all begun our mountaineering careers with an extremely foolish act.

NEWYORKER: Bear Meat