The quality of teaching is good or bad, mainly manifested in the classroom teaching.

教学质量的好坏，主要体现在课堂教学中。

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And the core competition manifested mainly in the cost.

而企业的核心竞争主要体现在成本上。

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And the core competition manifested mainly in the cost.

而企业的核心竞争主要体现在成本上。

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