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
I have good news and bad news, which do you want to hear first?
我有好消息和坏消息，你想先听哪个？
Each day brings its own bread.
天无绝人之路。
It's to the north of England; it's part of Britain.
它位于苏格兰的北部，是不列颠的一部分。