Some libraries operate by generating code and running it to perform some operation for the caller.

某些程序库的运作方式为产生程序码，并执行它以进行呼叫端的某些作业。

youdao

In our discussions, it has become clear that not everyone has a good understanding of how libraries operate, much less how libraries do (or could) operate in the ebook context.

FORBES: What Is Going On With Library E-Book Lending?

Reducing the number of days some libraries operate.

BBC: South East Wales