3、21-30 ...
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21. The Gryffindor ghost Nearly-Headless Nick was decapitated for giving a woman a tusk.
格兰芬多的幽灵差点没头的尼克因为给了一名女人一个象牙而被砍头。
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22. Members of the Order of the Phoenix are the only wizards who know how to communicate via patronus.
只有凤凰社的成员才知道如何通过守护神沟通（传信之类）。
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23. Hagrid is known to be twice the size of a normal human, but in the movies he is know to be 8'6''.
海格身高是普通人类的两倍，不过在电影中他身高6英尺8英寸（203.2cm）。
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24. Harry Potter and the Goblet of fire was originally supposed to be in two parts.
《火焰杯》本来是要分上下集拍的。（某灯：什么？想看！）
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25. The actors had around 3 weeks of dance lessons prior to the Yule Ball, with the exception of Daniel Radcliffe, who only had 4 days.
拍圣诞舞会前演员们花了三周学跳舞，不过丹尼尔·雷德克里夫只有四天来学。
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26. The Elder Wand is the only known wand in existence with a hair from the tail of a Thestral at its core.
长老魔杖是唯一一根已知现存用夜骐尾巴毛作为核心的魔杖。
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27. Severus Snape is the only Death Eater who can produce a Patronus.
西弗勒斯·斯内普是唯一一名能变出守护神的食死徒。
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28. The inscription on the Mirror of the Erised reads "Erised stra ehru oyt ube cafru oyt on wohsh." Backwards, it reads "I show not your face but your heart's desire".
厄里斯魔镜上写着"Erised stra ehru oyt ube cafru oyt on wohsh"。倒过来读的话，就是“我映照出的不是你的面孔，而是你内心的渴望”。
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29. The Death Eaters were once called the Knights of Walpurgis.
罗琳本来想称食死徒为“瓦卜吉司骑士”。
（注：Walpurgis即Walpurga，是一名德国修道院院长，因抵抗巫术成了人民的保护女神，详细可搜wiki词条Saint Walpurga）。
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30. There are 10 differnet spiecies of dragon.
（在HP世界中）有十种不同种类的龙。
TBC
作者有话说第3章 21-30
，还差 