Pentacarboxylic acid
[化] 五羧酸
🧩 词语组成解析
🗣️ 情景例句
How soon will my mail be received by the other end?
我的信件多快能被对方收到？
I'm from out of town.
我从城外面来。
These movements are controlled by the trainer with the metal-pointed stick,
训练员要用有锋利金属尖的长棒控制它的这种举动，