... a difficult problem 一道难题 a fiendish problem 极大的难题 a growing problem 越来越大的问题 ...
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风能离我们这么远的原因就是传输是一个极大的难题。
The reason wind power still won't get us very far is that transmitting this power is such a huge difficulty.
现代软件开发的快速节奏给测试团队带来了极大的难题。
The fast pace of modern software development creates tremendous challenges for the test team.
然而，这一备受争议的理论也存在着极大的理论障碍和未解难题：缺乏衡量的客观标准，结论的妥当性易受质疑。
However there is theory obstacle and unsolved difficult problem in the theory disputed by others: lack of the objective standard of weighing and the appropriate of conclusion is queried.
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