Quaterisation
季铵化反应
🗣️ 情景例句
Don't worry, it's in the bag.
不用担心， 这事儿十拿九稳。
I took off my galsses.
我摘下了我的眼镜。
This is how they keep their way of life alive.
他们就是这样使自己的生活方式得以保持和延续。