Quaternarization
[化] 季铵化作用; 门秀金反应
🗣️ 情景例句
What guarantee do I have that it won't break down easily?
有什么保障它不会轻易出故障？
Happiness takes no account of time.
幸福不觉光阴过。
The winch was again put into operation and one of the men started up the truck.
绞盘机再次启动，一位工人发动了急修车的引擎。