The existing algorithm to solve the unknown problems is studied and the improved computer algorithm is given.

对可拓学中解求知问题的已有算法进行分析，提出关于该算法的改进方法，并给出了相关的计算机算法描述。

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Longyou stone caves discovered recently, followed with interest widely because of their vast caves, high excavation techniques as well as many unknown problems.

新发现的龙游石窟群，由于其规模之大，地下开挖水平之高，也由于存在着许多疑团而引起广泛的关注。

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Davies: the problems on Mars include radiation, breathing dust, and other rigors of the environment that are unknown.

戴维斯：火星上的问题包括辐射、可吸入粉尘、以及其他一些未知的严酷环境。

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Unknown health problems are more of a threat than known ones.

ECONOMIST: Can humans cope with the final frontier?

The latest version of Bear's theory, published in 2008, holds that similar protein production problems may be at play in many cases of autism of unknown cause.

FORBES: Magazine Article

Right now, trading ranges are an unknown as the market digests a recent bout of macroprudential measures, further monetary easing and continued problems with the European Union.

FORBES: Deutsche Bank Prefers Brazil In Small Doses