Preparative column
[化] 制备柱
🧩 词语组成解析
a. 准备性的, 预备性的\\nn. 预备, 准备, 预备信号
column
['kɑləm]
n. 纵队，列;圆柱;专栏;
🗣️ 情景例句
He has no command over himself.
他不能克制自己。
Again? ...Still?
又来
The hovercraft is particularly useful in large areas with poor communications such as Africa or Australia;
气垫船在非洲、澳大利亚等交通不发达地区特别有用。