That expressionless face had seemed deep and mysterious.

那张毫无表情的脸看上去深沉而又神秘。

youdao

He just sits there with a blank expressionless face - watching.

他茫然地面无表情地坐在那里——看着。

youdao

As a result: the expressionless face became the "it" look, thanks to Botox.

结果：由于肉毒杆菌毒素的存在，面无表情成了标准表情。

youdao

As he spoke of Baxter, of how he found out about the suicide, Skilling kept his face expressionless.

NPR: Skilling Takes Stand, Proclaims Innocence at Enron Trial

Most people have a blank, expressionless look on their face when listening to someone else talking.

FORBES: Smile For The Camera -Media Training

She recognized the bushy hair and the blue shirt, yet for a moment she willed her face to stay expressionless, hoping that Walter would think that he had waved at the wrong woman.

NEWYORKER: Alone