The ideal pattern of the echelon formation is subjected to a certain rules and should have its own necessary measures to guarantee its development.
理想的教师学科梯队模式既要遵循一定的原则，又要具备必要的保障措施。
The ideal pattern of the echelon formation is subjected to a certain rules and should have its own necessary measures to guarantee its development.
理想的教师学科梯队模式既要遵循一定的原则，又要具备必要的保障措施。
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