Ethynation
乙炔化
🗣️ 情景例句
Thanks, Mom.
谢谢 ，妈妈。
I would like to ask you a favor.
我可以提出一个要求吗？
Here you are. Put them on, please. You must look after your clothes.
给你们，穿上吧！你们要好好保管你们的衣服。