Quaternization
(=quaternarization)季铵化作用, 成季碱反应
🗣️ 情景例句
I knew it.
我也知道了 。
Marriage goes by contrasts.
夫妻之间难免有差异。
when the plane suddenly turned round and flew back to the airport.
这时飞机突然调转头来，飞回了机场。