Polynorbornene
[化] 聚降冰片烯
🗣️ 情景例句
She flunked her English examination.
她的英语考试失败了。
Nothing is difficult to the man who will try.
世上无难事，只要人肯试。
Has your company done any research in this field?
请问贵公司对此范畴做了任何研究吗？