语音讲解：
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　　The birds and the bees

　　两性关系

　　the basic facts of sex and human reproduction as explained to children

　　向小孩解释性别差异及生殖缘由

　　I can't believe that Lorna's 26 years old and still doesn't know the faintest thing about the birds and the bees.

　　洛娜已经二十六岁了，但对两性关系一事却一窍不通，我实在不敢相信。