技经肯綮,知妙也——以《大鱼和小鱼》一课为例谈绘画教学的有效指导
기경긍계,지묘야——이《대어화소어》일과위례담회화교학적유효지도
Focus on the crux, and problems are readily solved:an effective instruction of lesson Big Fish and Small Fish
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