疑难的英文：
difficult to solve
complicated

参考例句：
  • their adoration interrogates
    他们的颂赞带着疑难。
  • Now the snag in this sort of anecdote is of course that one cannot distinguish cause and effect.
    当然,这一奇闻怪事的疑难之处在于无法确定因果关系。
  • What makes the anecdote a puzzle was that the consequence of it was not found.
    当然，这一奇闻怪事的疑难之处在于无法确定因果关系。
  • Some elusive words have not explained or explained unreasonably in vernacular works in the Ming and Qing Dynasties.
    明清白话作品中有一些疑难词语，或至今无人作释，或释而未当。
difficult是什么意思：
adj. 困难的；执拗的；不易相处的
  • The exercise is that difficult!
    练习题那么难！
  • You must admit the task to be difficult [ that the task is difficult ].
    你应当承认这项任务是艰巨的。
  • You must admit the task to be difficult [that the task is difficult].
    你必须承认这项任务是困难的。
solve是什么意思：
v. 解决；破解
  • Will you help me to solve this twister?
    你能帮助我解决这个难题吗？
  • I just solved the mystery.
    我刚刚把那个谜底解开了。
  • It was a physical problem that had to be solved.
    要解决的问题是个实际问题。
complicated是什么意思：
adj. 结构复杂的
  • The sceptic knows that life is complicated.
    怀疑论者却深知人生是如此错综复杂、扑朔迷离。
  • Involved or intricate, as in structure; complicated.
    复杂的在结构中牵扯较多的或错综复杂的；复杂的
  • There is no need to complicate matters.
    没有必要使问题复杂化。

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