The third stage is the intuitive stage.
第三阶段是直觉阶段。
The “pre-rigorous” stage, in which mathematics is taught in aninformal, intuitive manner, based on examples, fuzzy notions, andhand-waving.
“前严谨”阶段。在此阶段以一种非正式，直觉性的方式来教数学，建立在例子，模糊的符号，借助手势的基础上。
The “pre-rigorous” stage, in which mathematics is taught in aninformal, intuitive manner, based on examples, fuzzy notions, andhand-waving.
“前严谨”阶段。在此阶段以一种非正式，直觉性的方式来教数学，建立在例子，模糊的符号，借助手势的基础上。
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