Tosate
对甲苯磺酸基团
🗣️ 情景例句
After studying an hour, I finally got the hang of the lesson.
我学习了一个小时，终于理解了这一课的要点。
That was clever the way you worked out your problem.
那是解决你的问题的好办法。
Can you tell me why?
能告诉我什么原因吗？