this practice has spoken
这种做法已经说明了
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Combining with the practice of classroom teaching in middle schools, this paper has a preliminary probe into the principles and skills of the use of spoken language in biology teaching.
联系中学课堂教学的实践，初步探讨了生物教学口语运用的原则和技巧。
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