Clarification on pipenv and virtualenv

In the Virtual Environments document (dev/virtualenvs/) we start off by learning about pipenv but then move on to the lower level virtualenv. It is a little unclear under what circumstances we would be using virtualenv? I mean, I know it can practically be used, but for folks approaching Python for the first time it can be confusing.

I'm not suggesting the virtualenv section should go away, but maybe some additional clarification would be helpful. Something along the lines of:

"pipenv wraps a lower-level virtual environment utility - virtualenv. If you want to learn about using virtualenv, read on. Otherwise you can skip to the next chapter."

Where I personally really started getting confused is under Other Notes. Without scrolling back up the page it is not clear if this section is a part of the virtualenv discussion or if it is meant to be top-level and thus applicable to both pipenv and virtualenv.

Things become murkier when we start throwing additional utilities into the mix - as someone without experience with these utilities it seems to me that together they run somewhat parallel to pipenv.

Thanks for your hard work on this guide!

从 dev/virtualenvs/ 中的 Virtual Environments 文档开始，并结合阅读 pipenv、virtualenv 和 Other Notes 部分。明确 pipenv 与 virtualenv 的关系，说明读者在什么时候可以跳过 virtualenv 相关内容，并明确哪些说明适用于每个工具；当 Python 初学者能够毫无困惑地读懂该部分时，即表示完成。