The most likely cause for this error is that the cache administrator does not allow this cache to make direct connections to origin servers, and all configured parent caches are currently unreachable.

很可能起因为这个错误是贮藏所管理员不允许这个贮藏所做与起源服务器的直接连接，并且所有配置的父母贮藏所当前是不能得到的。

youdao

The most likely cause for this error is that the cache administrator does not allow this cache to make direct connections to origin servers, and all configured parent caches are currently unreachable.

很可能起因为这个错误是贮藏所管理员不允许这个贮藏所做与起源服务器的直接连接，并且所有配置的父母贮藏所当前是不能得到的。

youdao