Ethynylation
炔化, 乙炔化作用
🗣️ 情景例句
Lincoln Center, home of the Metropolitan Opera,
林肯中心 ，大都会歌剧团，
All products have to pass strict inspection before they go out.
所有产品出厂前必须要经过严格检查。
Thanks for your flattering me.
多谢你的夸奖。