Understructure
n. 基础, 下层结构
🗣️ 情景例句
Hello, sir.
您好，先生。
Cleanliness is next to godliness.
清净近乎神圣。
It had broken down the previous summer, and though I promised to repair it, I had never got round to it.
那台割草机去年夏天就坏了，尽管我答应修，但一直没抽出时间，