Pona number
[化] 波纳值
🧩 词语组成解析
abbr. paraffin; olefin; naphthene; aromatic (test for petroleum octane rating) 链烷烃
🗣️ 情景例句
Sorry, I've already got plans.
对不起， 我有事。
Don't reject his offer of marriage.
别盲目拒绝他的求婚。
I spent the whole day in my room, but I did not write a single card!
我在房间里关了整整一天。然而竟连一张明信片也没写成！