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在教学中存在这样一种令人关注的现象:有些教师上每一堂课都事无巨细、精雕细琢,而其教学效果却往往不如那些教风粗放、手段简约的教
In teaching there is such a phenomenon of concern: some of the teachers on every lesson is superb, uncompromising attention, but its teaching effectiveness is often not as good as those who teach extensively, simple means of teaching