I believe that communities exist as homes for professionals to learn, teach, and reflect on their work.

我相信社区是作为专业人士学习、讲授以及反思他们的工作的家而存在的。

youdao

Old projects exist as well (and this is OK) as it allows for developers to also learn how to maintain legacy systems.

老项目的存在(这个也很有帮助)，因为它可以让程序员学会如何维护遗留系统。

youdao

The police furnished them with a new address, so they went to another village, only to learn the address didn't exist.

警察给他们提供一个新地址,他们又去了另外一个村,竟然发现这个地址根本不存在。

youdao

Basically I'd been looking for things that didn't exist, and I had to learn how to create them.

WSJ: Community by Design | Architecture

Communities and Local Government Secretary Eric Pickles said he was "shocked" to learn that such a register did not already exist.

BBC: Tory MP calls for trade union register