crystal class

例句：

1. 1. This crystal class is very popular among students.
   这个水晶班级在学生中非常受欢迎。
2. 2. The teacher introduced the concept of crystal class in the classroom.
   老师在教室里介绍了晶体班的概念。
3. 3.The crystal class was designed to help students improve their problem-solving skills.
   晶体班旨在帮助学生提高解决问题的能力。