Stability control of expansive soil slope is one difficult problem of engineering construction.

膨胀土边坡稳定性控制是工程建设的一大难题。

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With the further exploration of Tuha basin, one difficult problem is logging interpretation and reservoir evaluation for low porosity and low permeability reservoir.

随着吐哈盆地勘探的进一步深入，低孔、低渗储层是测井解释和储层评价的一个难题。

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The program design of fuel gauge has been one difficult problem in the software development of the auto meter, and the indication error of fuel gauge is often complained by clients in the meantime.

燃油表的程序设计一直是汽车仪表软件开发的难题，同时燃油表的指示误差也是客户经常抱怨的问题。

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In many ways for Aristotle as it is for every student of politics the most serious the most difficult issue one confronts is the problem of faction.

从很多方面看来，无论是对亚里士多德,还是每位政治系的同学而言,最令人最感严肃,与严重的问题,是派系的问题。

耶鲁公开课 - 政治哲学导论课程节选

Each one of these is a difficult problem to unwind, and many of us struggle with more than one.

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One problem was that it is extremely difficult to recreate the effect in the laboratory.

ECONOMIST: Recreating the planet's magnetic field in a laboratory

But, to judge from Mr Sabbagh's book, most mathematicians would incline more towards Hilbert's view that a solution will one day be found for even the most difficult mathematical problem.

ECONOMIST: Mathematics