Ethinylation
乙炔化
🗣️ 情景例句
Me?
我？
To stand on your hands
倒立
Twenty or thirty pages of information handed to any of the major world powers around the year 1925 would have been sufficient to change the course of world history.
如果把二三十页的情报交给1952年前后的任何一个世界强国，就足以改变世界历史的进程。