Olefin
n. 石蜡, 烯烃\\n[化] 烯烃
🗣️ 情景例句
Where are you from?
你是从哪儿来的？
A man may dig his grave with his teeth.
祸从口出。
and found our then prevailing primitive state completely uninteresting to their own advanced knowledge.
并且发现我们地球当时普遍存在着的原始状态同他们先进的知识相比是索然无味的。