Have I done sufficient work on geological background and depositional environment?
自己是否做了足够的了解地质背景和沉积环境的功课？
Traditional coal depositional model can hardly explain the cause of this extra-thick coal seam.
传统的煤沉积模式难以解释其超厚煤层的成因。
Traditional coal depositional model can hardly explain the cause of this extra-thick coal seam.
传统的煤沉积模式难以解释其超厚煤层的成因。
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