Polychloriznation
多氯化反应
🗣️ 情景例句
The global economy helps make the world smaller and smaller.
在全球经济的推动上，世界变得越来越小。
The post office is in the middle of the block, You can't miss it.
那邮局就在街区的中间，很好找。
Thank you very much.
谢谢。