Quaternarization
[化] 季铵化作用; 门秀金反应
🗣️ 情景例句
to meet the rest of the troop at two o'clock at the museum.
我们得在两点钟到博物馆与其他童子军会合。
At ease.
休息。
What happened next?
跟着发生了什么事？