老教授走进教室，打开书本便开始讲课的翻译：The old Professor came in, the open book begins lecturing 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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The old Professor came in, the open book begins lecturing

Senior professor enters the classroom, opens the books then to start to teach

An old professor, opened the book went into classroom lectures will begin

The old Professor came in, the open book begins lecturing