He's a large, languid man with a round and impassive face.

他是一个无精打采的大汉，长着一张毫无表情的圆脸。

《柯林斯英汉双解大词典》

His face is impassive.

冷漠的表情。

youdao

Again I was impassive and expressionless.

我还是面无表情、不露声色。

youdao

Again I was impassive and expressionless.

我还是面无表情、不露声色。

youdao