primary structure的用法和樣例：
例句
- The structure of the sentence is strange.
這個句子的結構很奇怪。 - It will recrystallize into the original structure.
它將重新結晶為原來的結構。 - It shows that acidic volcanic lava has a specific characteristic of the primary structure in the specific paleogeographic environment.
它標志著酸性火山熔巖在特定的古地理環境下所形成的原生構造的特殊性。
