对于掌权者而言，这使得历史作为一门学科不仅毫无用处，而且危险。

For those in power, this makes history as a discipline not only useless but dangerous too.

youdao

上高中之前，姜浩是“读书无用论”的拥护者，这完全是受了他的父母的感染。

Before senior middle school, affected by his parents, Jiang Hao upheld the notion that study was useless.

youdao

征服者们知道行为本身毫无用处。

Conquerors know that action is in itself useless.

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