Pentabasic acid
[化] 五元酸; 五元碱酸
🧩 词语组成解析
a. [化]五元的,五基的
🗣️ 情景例句
and we're trying to resolve that problem.
试图解决这类问题。
Easier said than done.
说话容易做事难。
she rang up her daughter and asked for her help in what she described as a little spot of bother.
她只得打电话向女儿求援，说她碰到了一点儿小麻烦。