Arquad
卤化烷基三甲基铵(阳离子表面活性剂), 季铵盐萃取剂
🗣️ 情景例句
Yes.
有。
Poverty shows us who are our friends and who are our enemies.
贫困才能显出敌和友。
good-tempered elephant who will give many years of loyal service.
脾气温顺、能忠实为人服务多年的大象。