Lactonic
a. [化]内酯酸的, 无水氢氧酸类的
🗣️ 情景例句
Well, I've thought a lot about which college,
嗯， 我为了上哪一所大学想了很多，
There's nothing interesting in the newspaper.
报纸上没有什么有趣的新闻。
Fifteen minutes passed and then, at five to twelve, the clock stopped.
15分钟过去了，而就在11点55分时，大钟停了。