Pentadecalactone
[建] 十五酸内酯
🗣️ 情景例句
Mom and Dad are already on their way down to the gallery.
妈妈和爸爸已经出发去画廊了。
You have my word.
我向你保证。
I regretted saying it almost at once.
但马上又后悔说了这话。