Polynorbornene
[化] 聚降冰片烯
🗣️ 情景例句
Hi, Dad.
你好， 爸爸。
Wisdom is a good purchase though we pay dear for it.
我们为了求知识，付出高价也值得。
When I returned form abroad recently, a particularly officious young Customs Officer clearly regarded me as a smuggler.
最近一次，我也出国归来，碰上一位特别好管闲事的年轻海关官员，他显然把我当成走私犯。