She managed to keep a poker face.

她设法不露出任何表情。

《柯林斯英汉双解大词典》

Keep a Poker face in business situations.

要保持一种办现公事时一本正经的神态。

youdao

I tried to keep a poker face even though I was scared to death.

虽然我吓得要死但还是极力保持若无其事。

youdao

I always keep a complete poker face.

我总是绷着一张脸。

youdao

I always keep a complete poker face.

我总是绷着一张脸。

youdao