difficult problem翻译
difficult problem的基本解释
读音: 美: 英:
困难问题：指具有挑战性、复杂性或难以解决的问题。
例句
In itself, it's not a difficult problem to solve.这本身并不是个难解决的问题。《牛津词典》How to improve the quality of products was a difficult problem to him.如何提高产品质量对他来说可是个难题。
Extracting heat from very hot, dry rocks presents a more difficult problem: the rocks must be fractured to permit the circulation of water, and the water must be provided artificially.从极热的而干燥的岩石中提取热量，暴露出了一个更加困难的问题：必须击碎岩石以保证水的循环，而水必须是人工提供的。
短语
Realistic difficult problem 现实难题big and difficult problem 老大难 ; 老大难”
a difficult problem you solved 你解决的难题
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