Zeng Pu early discussion of the classroom atmosphere associated with the external environment, he said: "The classroom teaching is an open system, in its internal environment changes, it is always subject to external environmental factors and influence."

The Portuguese were first discussed the classroom atmosphere and the external environment, he said: "The classroom is an open system, in its internal environment in their own changes, and it is always from the outside environment and impact factors. "

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Portuguese classroom atmosphere associated with the external environment was discussed in early, he said: "teaching is an open system, changes in their internal environment itself, which is always subject to restriction and influence of external environmental factors. ”

Zeng Puchu discussed the classroom atmosphere with the external environment connection, he thought: “The classroom instruction is an open system, in its internal environment own change, it receives the external environment various factorss throughout the restriction and the influence.”