一个样本代码目录。

A directory of sample code.

youdao

业务逻辑代码使用服务定位器避免目录查找代码变得混乱，因此它很容易理解。

Business logic code that USES a service locator avoids becoming cluttered with directory lookup code, and so is easier to understand.

youdao

对于根目录，只返回404状态代码是不够的，因为尽管目录返回404状态代码，但有可能在目录之下还有文件。

It isn't enough for the root of the directory to return a 404 status code, because it's possible for a directory to return a 404 but still serve out files underneath it.

youdao