教学本质问题是教学论历久弥新的课题，更是教学本体论的核心所在。
The problem of teaching essence is a lasting and new task of teaching theory, and an essential one of the theory of teaching reality.
本体论的问题解决了，如何解决教学中的现实问题呢？
How to solve the realistic problems in teaching, after solving the problem of ontology?
教学实践活动是教学理解的本体论前提和基础，它规定了意义之为意义和意义存在的理性依据。
Instructional practice is the ontological precondition of instructional understanding, because it stipulates the rational-foundation for why significance is itself and why exists.
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