He doesn't say those silly things that unthinking people say.

他不说那些考虑不周的人才会说的傻话。

《柯林斯英汉双解大词典》

He didn't come at all. It was silly of us to keep on waiting for him.

他根本没有来，我们傻等了他半天。

《新英汉大辞典》

Once Tootles began, which was not very often, he had a silly way of going on.

图图不常开口，但他一开口，就会变得十分愚蠢。

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He was being interviewed by Carl Reiner, and he would ask him questions, and in his comic German accent he would give silly answers.

卡尔·雷纳介绍了一下他,然后问了他几个问题,接着他会带着,滑稽的德国腔去做出荒唐的回答

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He sounded silly when he opened his mouth.

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"I think what he did was silly and stupid, but he was still a good governor, " said voter Stephanie Shackelford of James Island.

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You know how he sometimes says really silly things, wrapped up in that phoney sincerity of his?

BBC: News | UK Politics | John Maples speech in full