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
Well,
好啦，
I swear I'll never tell anyone.
我发誓不告诉任何人。
'Everyone's losing money these days,' he said.
“现在大家都在丢钱，”他说。