Lactonic
a. [化]内酯酸的, 无水氢氧酸类的
🗣️ 情景例句
They're in my office.
在我办公室。
The sight of the food made my mouth water.
看见食物，我就垂涎欲滴。
No, they aren't. They're their books.
不，不是我的。这些是他们的书。