Pentadecalactone
[建] 十五酸内酯
🗣️ 情景例句
I'm glad to have met you.
非常高兴认识你。
As soon as I get to Guangzhou, I'll drop you a line.
我一到达广州，就给你写信。
What's it like in summer?
夏季的天气如何呢？