Olefination
烯化作用, 成烯作用
🗣️ 情景例句
He's had so many colds and sore throats recently.
他最近常常感冒喉咙痛。
Draw not your bow till your arrow is fixed.
事未齐备，切莫妄动。
The bridge is so long that the shape of the earth had to be taken into account by its designer.
由于桥身太长，设计者不得不考虑了地表的形状。