面具；面罩a covering for part or all of the face, worn to hide or protect it
a gas/surgical mask
The robbers wore stocking masks.
假面具something that covers your face and has another face painted on it
The kids were all wearing animal masks.
护肤膜；面膜a thick cream made of various substances that you put on your face and neck in order to improve the quality of your skin
a face mask
伪装；掩饰a manner or an expression that hides your true character or feelings
He longed to throw off the mask of respectability.
Her face was a cold blank mask.