但是我们都有困难。
我们都有问题。
We all have problems and many of them don't have an immediate solution.
我们全都有（自己的）困难。其中许多没有立即的解决办法。
We should all have such problems.
我们可能都有此问题。
But, as we have seen, market forces, all by themselves, will not solve social problems.
但正如我们所看到的，市场力量本身解决不了社会问题。
We all have our own pet world problems which seem more crucial than others.
我们都有自己所宠爱的世界问题——它们看起来比其他问题更为紧要。
We must have a clear idea of all the problems involved.
我们必须对一切涉及到的问题有一个清楚的概念。
We have to deal with all kinds of problems in our daily life.
在日常生活中，我们不得不处理各种问题。
We have tried to include problems at all levels of difficulty.
我们尽可能的使它们难易程度不同。
In particular we show that all the standard logics have decision problems in PSPACE.
尤其是，文中指出，所有标准逻辑在PSPACE中都存在决策问题。
In particular we show that all the standard logics have decision problems in PSPACE.
尤其是，文中指出，所有标准逻辑在PSPACE中都存在决策问题。
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