必须有的英文：
there ought to be

参考例句：
  • The people must have a voice.
    人民必须有发言权。
  • The herd must be culled.
    必须有选择地杀掉部分牧畜.
  • It takes two to make a quarrel. -- Henry Kingsley
    必须有两个人,才有争吵。--　金斯莱
  • The material must be moderately coherent and firm.
    材料必须有适度的粘着力和坚固性。
  • A long-distance runner must be long-winded.
    长跑运动员必须有一口气能跑很长距离的本领。
  • An inconvenience of prism couplers is that the prism material must have a high refractive index ??
    棱镜耦合器的一个不方便的地方是棱镜材料必须有较高的折射率?搿?/UK>
  • To preserve and pass on this dance, the clan must have someone to master, rehearse, and organize the dance.
    为了保存、传承这种舞蹈，氏族中就必须有乐舞的掌握者、排练者和组织者。
  • For an expenditure to qualify as an intangible asset, there must be reasonable evidence of future benefits.
    一项支出要成为无形资产,必须有合理的能让将来受益的证据。
  • All right, you know, the first time you should be in love. You know, totally… "goo-goo" for the other person .
    好吧，你说得好像是上一堂什么课似的。说回来呢，第一次必须有爱嘛。 得对对方脉脉含情。
  • Must be confident.
    必须有自信。
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
    ought是什么意思：
    v. 应该；大概
    aux. 应该；大概
    • They ought to stop at the pedestrian crossing.
      他们该停在人行横道上。
    • You ought to do your duty.
      你应该尽到自己的责任。
    • He ought, in that event, to have an establishment.
      在那种情况下，他应该成家。
    • Teachers ought to be patient with students.
      教师对学生应该耐心。
    • He ought to have arrived by this time.
      此时此刻他早该到了。

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