Pentadecalactone
[建] 十五酸内酯
🗣️ 情景例句
I'm glad I ran into you. Where have you been hiding lately?
我很高兴碰见你，你躲到哪里去了？
Half the world knows not how the other half lives.
富人不知穷人苦。
That's life.
这就是生活。