It is an almost insoluble problem.
这几乎是一个不可解决的问题。
We couldn't finish the insoluble problem given by our teacher.
我们没法解决老师给的那个不能解决的问题。
I pushed the problem aside; at present it was insoluble.
我把这个问题放到了一边；目前它是无法解决的。
Stated clearly, this problem may seem both simple and insoluble.
说得清楚一点，这个问题可能似乎简单却又不易解决。
The problem is not simple; however, that does not mean it is insoluble.
问题并不简单；然而，那并不意味着它是不能解决的。
And when the problem seems most insoluble.
当问题好像几乎无解。
And when the problem seems most insoluble.
当问题好像几乎无解。
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