His face is rigid like a mask.

他的脸像个面具一样僵着。

youdao

Grim amusement came on his face like a mask.

狞恶高兴的神色象假面具似的笼罩住了他的脸。

youdao

Grim amusement came on his face like a mask.

狞恶高兴的神色象假面具似的笼罩住了他的脸。

youdao