以《国际地层指南》的多重地层划分观点为基础，建立了一套完整的义县组岩石岩层单位。
According to the multiple stratigraphic division of the International stratigraphic Guide, a complete column of lithostratigraphic units of the Yixian Formation has been erected.
无可否认的是，对于大型企业来说这是极具挑战性的，因为他们的规模、报告结构和多重地理范围的因素。
Admittedly, this can be a challenging activity for large enterprises because of their sheer size, reporting structures, and tendency to spread departments across multiple geographies.
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