He clammed up when I asked him who else was involved.

当我问他还有谁参与此事时，他咬紧牙关，不肯交代。

youdao

I clammed up. And finally, I asked her to chew the cud for such an important decision.

我没说话，最后，我叫她仔细考虑这个重要的决定。

youdao

If they weren't good scientists, they kind of clammed up and kept doing what they were doing.

如果他们不是好的科学家，他们会选择沉默，继续做自己的事情。

youdao

It's been reported that he has not -- he's clammed up over the last few days.

WHITEHOUSE: Press Briefing

For long after the war, most Germans clammed up about the Nazi past.

ECONOMIST: Charlemagne

On one occasion, I tried to get her to say something about her husband, but she clammed up at that.

NEWYORKER: Clara