mistresses
n.
情妇( mistress的名词复数 );
（尤指旧时雇用仆人的）女主人;
主妇;
（尤指私立学校的）女教师;
例句:
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He procured girls of 16 and 17 to be mistresses for his influential friends.
他介绍了些十六七岁的女孩给他那些有权势的朋友当情人。
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The game over, the mistresses ordered him to take the guests home.
牌局散了, 太太叫他把客人送回家.
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The tenderness of lovers can ill brook the least jesting with the names of their mistresses.
情人们一点也受不住旁人拿他们情侣的名字开玩笑.
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Edward also had a series of long-term mistresses, including the actress Lily Langtry.
来自BBC
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The children were born onto the mistresses lap, and were considered her children.
来自SA
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Daughters by his first wife and three more acknowledged mistresses were married off tactically.
来自WSJ