Pentahydroxy dibasic acid
[化] 五羟二价酸; 五羟二碱价酸
🧩 词语组成解析
a. 二元的\\n[化] 二元的; 二价的; 二碱价的; 二取代的
🗣️ 情景例句
Would you do me a favour look around your factory?
能否帮忙带我看一下你们工厂？
The problem is far from easy.
这问题绝非易事。
It starts at four thirty, doesn't it?
聚会4：30开始，是吧？