Instruction is a bilateralactivity of teaching and learning.
教学是教和学的双边活动过程。
2
Teaching is a systematic engineering art, a bilateralactivity based on cooperation.
教学是一种系统的工程艺术，是一种以合作为基础的双边活动。
3
Teaching is a bilateralactivity, teachers can not replace the students to acquire knowledge, and teaching results ultimately depend on academic performance.