How to realize safe coal mining under village buildings is one of main problems encountered by many mining enterprises.

村庄建筑物下安全采煤问题是煤矿企业面临的主要问题之一。

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The communication barrier between administrators and researchers is one of main problems in the research management of local agricultural research institutions.

沟通障碍是地方农业科研机构科研管理工作的主要问题之一。

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However, the landslide is the one of main problems for construction in complex geological environment as it usually gives rise to the probability of slope failure.

但由于大量工程建设地处复杂的地质环境条件区，边坡失稳时有发生，滑坡灾害成为山地丘陵区工程建设所面临的主要问题之一。

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"On the island one of the main problems that we suffer is high unemployment, " he said.

BBC: Asil Nadir: City conman with 'dangerous charisma'

One of the main problems with the newer drugs is their side effects.

FORBES: Pharmaceuticals

One of the main problems with looting is that if a site is undiscovered, you simply don't know what you don't know.

CNN: Opinion: Illegal antiquities trade funds terrorism