Certainly, no all-round knowledge can be acquired merely by glancing this way and that and relying on hearsay.

东张西望，道听途说，绝然得不到什么完全的知识。

《新英汉大辞典》

It is unlikely for a person to get all-round knowledge by merely reading books.

一个人不可能仅仅通过阅读书籍就可以学到全面的知识。

youdao

The author analyzes the present female librarians competence in the knowledge economy era, listing the requirements and main measures for improving their all-round development.

详细分析了知识经济时代图书馆女性馆员的素质现状，提出了在知识经济时代下女性馆员的素质要求，指出了提高女性馆员素质的主要措施。

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Whatever happens weather-wise, course knowledge round here is the real key, and you're hoping to avoid all the bunkers as Tiger Woods did when he won in 2000.

BBC: SPORT | Golf | In through the back door

One concern is that the bank has lost too much of the tacit knowledge of the workings of the financial-services industry needed to be a good all-round regulator.

ECONOMIST: The Bank of England