Upvc
abbr. unplasticized polyvinyl chloride 未增塑聚氯乙烯
🗣️ 情景例句
How are you feeling?
你感觉怎么样？
A little of everything, nothing at all.
每事浅尝辄止，结果将一事无成。
It's about20,000 kilometres.
大约有20，000公里。