activate English classroom atmosphere的用法和样例：
- Fourth, teachers of mathematics class active classroom atmosphere.
- Classroom humour helps to activate students' thinking, active the classroom atmosphere, harmonize the relationship between teachers and students, edify students' temperament.
- The classroom atmosphere is positive, although some of the students are very chatty!
- Teaching classroom atmosphere arouse the enthusiasm of the students, but if teaching too fast too slowly, and seems to Chita lengthy.