何必的英文：
there is no need
why should

参考例句：
  • There was no need for you to fight against your own men.
    你何必同室操戈。
  • Why should you be so suspicious?
    你何必多疑?
  • Yo, what's with all this hostility?
    喂，何必这么凶？
  • An unnecessary reference to his criminal past
    何必提到他的前科.
  • Why try to dredge up the sad facts of the past?
    过去的伤心事何必重提呢？
  • Why keep a dog and bark yourself?
    养狗何必自吠？
  • Why use wood when you can use plastic?
    既然能用塑料，何必非用木料？
  • I will not keep a dog and Bark myself
    既然养了狗,何必自己叫
  • You can't be dogmatic in matters of taste.
    对于个人爱好的事,何必这样自以为是.
  • You can' t be dogmatic in matters of taste
    对於个人爱好的事,何必这样自以为是
there是什么意思：
adv.在那里；在那点上
int. 你瞧，好啦
pron. 表示某物或某人的存在或某事的发生
    need是什么意思：
    v. 需要
    n. 需要，必要；需要的东西；需求
    • We need to provide for everything we will need for the trip.
      我们必须准备所有旅行要用的东西。
    • You need money and time, in addition, you need diligence.
      你需要金钱和时间，此外你还需要努力。
    • Do you need to wee?
      你要撒尿吗？
    why是什么意思：
    adv. （用作疑问副词）为什么，（用做关系副词）为什么
    n. 原因，理由
    int. 咦，哎呀，哦，当然，唔
    • Why are you in such a hurry?
      你为什么这样急呢?
    • Is this why the Yen is so strong?
      这是日元如此强劲的原因吗？
    • Why, I was fast asleep.
      怎么，我睡得很熟的呀。

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