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
If it's a good job,
假如它是个好工作
How did you break your leg?
你怎么弄断了腿？
I want to take some books to the classroom. Could you help me, please?
我想把一些书拿到教室里，你能帮个忙吗？