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
He didn't get a thing to eat.
他什么也没有吃。
Do you often learn geography on the weekend?
你常常在周末学地理吗？
That's good to know.
幸好知道了这件事。