Olefin
n. 石蜡, 烯烃\\n[化] 烯烃
🗣️ 情景例句
Maybe I can help. Tell me what it is, Susan.
也许我能帮忙。说给我听听 ，Susan。
I'm sick and tired of my monotonous life.
我对自己的单调生活感到厌倦。
Modern industry is based on the conception of the maximum production at lowest cost,
以最低成本获取最多产品，