Lactonic ketone
[机] 内酯
🧩 词语组成解析
a. [化]内酯酸的, 无水氢氧酸类的
ketone
['ki:toʊn]
n. 酮;
🗣️ 情景例句
Easy does it, tom. don't get all worked up.
冷静点，汤姆，不要太激动。
Why are you so short?
你为什么那么矮呀？
There should always be exceptions to the rule.
凡事总有例外。