These three levels mentioned above constitute the lateral structure of the system of scientific methods.
以上三个层次，构成了科学方法体系的横向结构。
Volcanic is characterized by irregular shape and fast change of lateral structure, which leads to the difficulty for volcanic identification.
火山岩具有形态不规则、横向结构变化快的特点，这给火山岩识别带来了较大困难。
Volcanic is characterized by irregular shape and fast change of lateral structure, which leads to the difficulty for volcanic identification.
火山岩具有形态不规则、横向结构变化快的特点，这给火山岩识别带来了较大困难。
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