Polyene
n. 聚烯\\n[化] 多烯; 多烯烃
🗣️ 情景例句
There's Mother and Grandpa ...
有妈妈和祖父呢……
I'm sorry. Am I keeping you awake?
对不起。我吵得你睡不着了吗？
Forty-two years later a tunnel was actually begun.
42年以后，隧道实际已经开始建了。