She is working at a difficult problem in mathematics.

她在做一道数学难题.

《现代汉英综合大词典》

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.

《现代汉英综合大词典》

When small fish face an extremely difficult problem,they deal with it by forming a school.

当小鱼面临极其困难的问题时，他们会立刻形成鱼群。

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The student decided to work out the difficult problem by himself.

这个学生决心独自解决这道难题.

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Our professor is too capable not to solve this difficult problem.

我们教授非常有才干,必定能解决这一难题.

辞典例句

The teacher set his pupils a difficult problem.

老师给学生出了一道难题.

辞典例句

The test of shock wave is a difficult problem in dynamic measurement.

冲击波的测试是动态测试中难度较大的测试问题.

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Eyelet phenomenon is a difficult problem in Image recognition.

:图像识别是计算机应用领域中的前沿技术,小内孔现象是导致识别率低的主要因素之一.

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Comprehensiveness characterizes the most difficult problem of geographical science.

综合性是地理学最高层次的科学难点问题.

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Fault diagnosis is a complex and difficult problem that concerns effective decision - making.

摘要故障诊断是与有效决策密切相关的复杂问题.

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He tried all manner of ways to solve the difficult problem.

为了解决那道难题,他试了各种方法.

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With factory's heterogeneous ship, this difficult problem will be easily solved.

用我厂的异型船, 这个难题就会迎刃而解.

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This difficult problem be solved by mounting winglets on the stabilizing wing.

采用在稳定翼上加装小襟翼的方法,即可以解决这一难题.

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The difficult problem presented by him entangled the conferees.

他所提出的问题使与会人士感到困惑.

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These are the new difficult problem that are placed before undertaker.

这些都是摆在承办人面前的新难题.

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