Quaterisation
季铵化反应
🗣️ 情景例句
He has an old head on young shoulders.
他年轻又有见识。
My grandfather got married in 1921.
我的祖父在1921年结婚。
It was also thought that by removing their main supply of food, the Native Americans would be forced to give in.
当时还有人认为，断掉了主要的食物来源，土著人就会被迫屈服。