Decarbonylation
脱羰作用
🗣️ 情景例句
Yeah, just like I certainly did not expect to buy these gifts at such low prices.
是啊，我怎么也没想到买这些礼物才花了这么点钱。
May I take pictures?
我能照相吗？
When you visit London, one of the first things you will see is Big Ben,
当你游览伦敦时，首先看到的东西之一就是“大本”钟，