Olefin
n. 石蜡, 烯烃\\n[化] 烯烃
🗣️ 情景例句
No, no. I just changed my seat.
不 不。我刚才换了一下座位。
In the crowd, Sam looked aside to avoid seeing her.
在人潮中，萨姆把头转向旁边，免得和她目光相对。
Even if a piped water supply is safe at its source,
既使管道供水系统在水源处是安全的，