自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-COUNT 面具;面罩;假面 A mask is a piece of cloth or other material, which you wear over your face so that people cannot see who you are, or so that you look like someone or something else.
The gunman, whose mask had slipped, fled.
...actors wearing masks.
N-COUNT （防细菌或有害物质的）防护面罩,面具，口罩 A mask is a piece of cloth or other material that you wear over all or part of your face to protect you from germs or harmful substances.
You must wear goggles and a mask that will protect you against the fumes...
She wore a surgical mask and rubber gloves while she worked with the samples.
N-COUNT (掩盖真实感情或性格的)伪装，掩饰 If you describe someone's behaviour as a mask, you mean that they do not show their real feelings or character.
His mask of detachment cracked, and she saw for an instant an angry and violent man.
N-COUNT （护肤用的）面膜 A mask is a thick cream or paste made of various substances, which you spread over your face and leave for some time in order to improve your skin.
This mask leaves your complexion feeling soft and supple.
VERB 掩饰(情感);伪装 If you mask your feelings, you deliberately do not show them in your behaviour, so that people cannot know what you really feel.
Dena lit a cigarette, trying to mask her agitation.
VERB 遮住;掩蔽;使…不易察觉 If one thing masks another, it prevents people from noticing or recognizing the other thing.
A thick grey cloud masked the sun...
Too much salt masks the true flavour of the food...