这种方法中仍然存在问题。

Problems do exist with this approach.

youdao

因此，非洲的仍然存在问题范围很广。

So the remaining problems in Africa are vast.

youdao

在服务器环境(主机到主机认证而不是用户到主机认证)中使用加密密钥时，这种解决方案仍然存在问题。

This solution still poses a problem when using cryptographic keys in a server environment (host-to-host authentication instead of user-to-host authentication).

youdao

That in many cases, I can gain efficiency if I'm willing to give up space. Having said that though, there may still be a problem, or there ought to be a problem that may be bugging you slightly, which is how do I guarantee that my hash function takes any input into exactly one spot in the storage space?

普遍存在的增益和权衡,在许多的例子中,可以通过牺牲空间而得到效率方面的增加,话说回来，仍然存在一个问题,或者应该会有一个问题困扰着你,就是我如何保证我的哈希函数能够准确将,任一输入映射到相应的唯一的存贮空间中去？

麻省理工公开课 - 计算机科学及编程导论课程节选