建立了管道腐蚀缺陷的多级评价体系，按照从简单到复杂，从保守到精确的顺序对缺陷进行分级评价。
The multilevel assessment system of corrosion defects is erected, which carries grade assessment according to the criterion from simpleness to complexity and from conservation to accusation.
一个对于生殖细胞高度保守的“内部的”遗传程序决定了构成生殖细胞发育基础的事件的发生顺序。
A highly conserved genetic program "intrinsic" to germ cells determines the sequence of events that underlies germ cell development.
分子杂交结果显示，编码功能蛋白的基因及其邻近顺序存在相当程度的保守性。
Southern hybridization results showed that coding sequences and neighboring sequences of genes were relatively conserved.
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