Quaternization
(=quaternarization)季铵化作用, 成季碱反应
🗣️ 情景例句
It's eleven thirty.
十一 点半。
That deep sigh could only express Helen's sadness.
那深深的叹息，不外乎表示出海伦的悲哀。
We shall all remember Mr.Page for his patience and understanding and for the kindly encouragement he gave us when we went so unwillingly to school.
我们不会忘记佩奇先生对我们既有耐心又充满理解，也不会忘记在我们不愿去上学时他给予我们的亲切鼓励。