Allylation
烯丙基化
🗣️ 情景例句
You don't know up from down.
你黑白不分。
When an opportunity is neglected, it never comes back to you.
机不可失，时不再来。
At the end of the concert, there was a great applause.
音乐会结束时，响起了热烈的掌声。