Carbocation
碳阳离子
🗣️ 情景例句
Thank you.
谢谢。
What time did you get to work yesterday morning?
你昨天早上什么时间上班？
South Africa passed further laws designed to make life difficult for non-whites.
而南非则通过了更多的法令，企图给非白种人的生活造成困难。