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
Rock'n roll is not my cup of tea.
摇滚不是我的所爱。
Danger itself is the best remedy for danger.
危险本身就是对付危险的最好办法。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。