karst development mechanisms

• 岩溶发育机理

karst development mechanisms的用法和样例：

例句

1. The structure of both synergids is known clearly, but its developmental mechanism and its roles during fertilization are not understood yet.
   助细胞的形态结构已研究的比较清楚，但有关助细胞的发育机理和它在受精中的作用则仍不明确。