Preview can make us have psychological preparation, can help us improve classroom efficiency.

预习可以使我们有心理准备，可以帮助我们提高课堂效率。

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After that they gave our teachers very professional reviews and guidance, and had a lively discussion about "how to improve classroom efficiency."

课后，专家对课做了点评和专业的指导，并与老师们一起就“如何提高课堂效率”进行了热烈探讨。

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Integration of distance self-study, online collective teaching, online one-on-one tutoring, and offline classroom teaching to effectively improve teachers' work efficiency.

远程自学、在线集中教学、在线一对一辅导、线下课堂教学相结合，有效提高教师的工作效率；

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