This paper pointed that the goal of history of science wasn't to excavate historical remains, and wasn't to solve difficult problem in scientific investigation either.

本文认为，科学史的目标不是挖掘历史的陈迹，也不是解决科学研究中的难题。

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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》

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She began to explain to the students how to solve a very difficult problem.

VOA: special.2009.10.25

Finally, the bill has gained support among Republicans, in part because it is seen as a technological fix to a difficult to solve problem.

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"It's always helpful to have somebody help buoy you in difficult times and problem-solve with and to share the marvelous moments with as well, " she said of living there with her husband.

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Those people who used to spend all day identifying the problems in the business now have all day to solve the problem or to develop new strategies for managing the business out of that difficult situation.

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