poker face

• 1. 

  N-COUNT A poker face is an expression on your face that shows none of your feelings. 面无表情的脸 [非正式]

  例：

  In business a poker face can be very useful.

  在生意场上，不露声色会非常有用的。

  例：

  She managed to keep a poker face.

  她设法不露出任何表情。