Lactone
n. [化] 内酯
🗣️ 情景例句
What if we can't tie the tie?
如果我们弄不好领结怎么办？
He that would command must serve.
欲做先生，先做学生。
Before returning home at night.He took a shower and changed back into his suit.
晚上回家前，他洗个淋浴，重新换上那身黑色西服。