Packed column
[化] 填充塔; 填充蒸餾塔
?? 詞語組成解析
packed
[p?kt]
adj. 充滿…的;塞滿了…的;
v. 包裝(pack的過去式和過去分詞);
column
['kɑl?m]
n. 縱隊，列;圓柱;專欄;
??? 情景例句
I don't know what-to do.
我不知道怎么做。
I want to be a journalist after graduation.
畢業后我想當記者。
I'm very well, thank you.And you?
很好，謝謝你。你好嗎？