The Baozhu Mountain granite body is a complex rock body.

薄竹山花岗岩体是一个复式岩体。

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There are the complete morphologic types and complex rock soil mass types.

全省地貌类型齐全，岩土体类型复杂。

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Research hon failure criterion of complex rock masses. Rock Mechanics in China, Scienece Press, Beijing, 1995.

极端复杂岩土体破坏准则研究。东北大学学报，1995，增刊。

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Mining executives say that while they chuckle about the quirks of older geologists, they recognize the business value of their memory of previous exploratory work, their grasp of complex rock formations and their discipline in knowing how to meticulously chart new territory.

WSJ: In Geology, Old-Timers Can Be Worth Their Weight in Gold

"While the general mechanisms that create induced seismic events are well understood, we are currently unable to accurately predict the magnitude or occurrence of such events due to the lack of comprehensive data on complex natural rock systems and the lack of validated predictive models, " it states.

CNN: Debate over fracking, quakes gets louder

Marsalis, JLCO's music director, said he was impressed by the amount of time the rock trio spent rehearsing the complex arrangements in order to master material outside their comfort zone.

WSJ: Crosby, Stills and Nash get jazzy with Marsalis