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 情妇 A married man's mistress is a woman who is not his wife and with whom he is having a sexual relationship.
She was his mistress for three years...
He has a wife and a mistress.
N-COUNT 女教师 A mistress is a female teacher.
My history mistress was extremely helpful.
N-COUNT 女主人 A servant's mistress is the woman that he or she works for.
It must be really bad, for her to ignore a summons from her mistress!
N-COUNT (狗的)女主人 A dog's mistress is the woman or girl who owns it.
The huge wolfhound danced in circles around his mistress.
N-UNCOUNT 绝对控制…的女人；主宰…的女人 If a woman is mistress of a situation, she has complete control over it.
She had always been mistress of her own destiny.
N-COUNT (精通某项活动的)女能手，女行家 If you say that a woman is a mistress of a particular activity, you mean that she is very skilled at it.
She is a mistress of disguise.
...another winner from the mistress of historical romance.