internal-external cause coupling 内外因耦合
internal-external cause coupling method 内外因耦合方法
internal and external cause 内因与外因
internal cause and external cause 内部动因与外部动因
The students from the poor family have bearing on the psychological predicament, and it has the external cause and the internal cause.
贫困家庭学生产生心理困境既有外因的影响，也有内因的影响。
The impetus of asset reorganization includes external cause and internal cause.
资产重组的动因有内在动因和外在动因之分。
CONCLUSION: Structure weak area of tooth was the internal cause of cracked-teeth occurrence, and traumatic occlusal force was the external factor tha.
结论：牙结构的薄弱环节是牙隐裂发生的内在因素，创伤性(？)力是促使牙隐裂发生的外在动力。
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