Ketoalkylation
酮烷基化(作用)
🗣️ 情景例句
Uh-hum.
嗯哼。
Foam plastics are applied to protect the goods against press.
泡沫塑料用来防止挤压。
Zheng Jie, I would like to support your music school.
郑杰，我愿意资助你办音乐学校。