primary structure

• [免疫]一级结构,[航空]主(要)结构

primary structure的用法和样例：

例句

1. The structure of the sentence is strange.
   这个句子的结构很奇怪。
2. It will recrystallize into the original structure.
   它将重新结晶为原来的结构。
3. It shows that acidic volcanic lava has a specific characteristic of the primary structure in the specific paleogeographic environment.
   它标志着酸性火山熔岩在特定的古地理环境下所形成的原生构造的特殊性。