Olefination
烯化作用, 成烯作用
🗣️ 情景例句
Well, I'll tell Richard,
嗯， 我会告诉Richard，
A work ill done must be twice done.
未做好的活，需要重新做。
When he went outside half an hour later, he was astonished to find the little black lamb was almost white.
半小时后，当他从屋里出来时，他惊奇地发现小黑羔羊全身几乎都变成白色。