Olefines
(olefine 的复数) [化] 烯烃; 链烯烃
🗣️ 情景例句
Paper or plastic?
现金还是信用卡？
To know one's self is true progress.
能有自知之明就是真正的进步。
She went into my room and got a big surprise when she saw all those books on the floor.
她走进我的房间，当她看到地板上的那些书时，大吃一惊。