Primary structure
[化] 一级结构
🧩 词语组成解析
primary
['praɪmɛri]
adj. 首要的，主要的;最早的，原始的;[地质学]原生的;基本的;
n. 第一位;最好者;要素;候选人提拔会;
prim第一，主要的+ary形容词后缀 → 第一的，最开始的 → 最初的；根本的
🗣️ 情景例句
His studies haven't been inproving lately.
他的学业最近没什么进步。
They are so busy these days, that they don't even have time for their friends.
他们最近忙得没法和朋友见面。
There are rare instances when justice almost ceases to be an abstract concept.
在个别情况下，正义不再是一种抽象概念。