Hierarchical structure
层次结构，分级结构; 递阶结构
🧩 词语组成解析
hierarchical
[ˌhaiə'rɑ:kikl;'haiə'rɑ:kikəl]
adj. 按等级划分的，等级（制度）的;分层的;
🗣️ 情景例句
First round's on me.
第一轮我请客。
It doesn't make any difference.
都一样。
Mainframe computers were very large indeed, often occupying whole air-conditioned rooms,
计算机主机确实很大，常常占据了装有空调的多间房间，