Each unit should have only limited knowledge about other units: only units "closely" related to the current unit.

每个单元对其他单元只拥有有限的知识，只了解与当前单元紧密联系的单元；

youdao

Looking at a number of sources gives you a good knowledge base, but students only have a limited amount of time to work on each paper.

阅读大量的文献可以打下坚实的知识基础，但是学生们完成每篇论文的时间非常有限。

youdao

I have only a limited knowledge of the language.

我对这门语言只有有限的了解。

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