理论必须与实践相联系，这被证明是个真理的翻译：Theory must be associated with the practice, it proved to be a truth 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

Theory and practice must be linked, which proved to be a truth

Theory must be associated with the practice, it proved to be a truth

The theory must relate with the practice, this by the proof is a truth

Linking theory with practice, it must be proved to be a truth

Theory must be associated with the practice, it proved to be a truth