The gunman, whose mask had slipped, fled.

面具滑落的持枪歹徒逃走了。

《柯林斯英汉双解大词典》

Whose mask is that? It's his.

这是谁的面罩？这是他的。

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Gao Wei: Whose mask is that?

高伟：那是谁的面具？

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Whose mask is that?

这是谁的面罩啊？

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Whose mask is this?

这是谁的面具？

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Whose is the face in the mask?

面具之下是谁的面容？

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A young officer, a trim black-uniformed figure who seemed to glitter all over with polished leather, and whose pale, straight-featured face was like a wax mask, stepped smartly through the doorway.

一个年轻军官潇洒地走了进来。他穿着黑制服的身躯细而长，全身似乎都发出擦亮的皮靴的光泽，他的线条笔挺的苍白的脸好像蜡制的面具。

youdao

A young officer, a trim black-uniformed figure who seemed to glitter all over with polished leather, and whose pale, straight-featured face was like a wax mask, stepped smartly through the doorway.

一个年轻军官潇洒地走了进来。他穿着黑制服的身躯细而长，全身似乎都发出擦亮的皮靴的光泽，他的线条笔挺的苍白的脸好像蜡制的面具。

youdao