Obviously, to fix this problem, you must avoid the cyclic class hierarchy.

显然，要修复这个问题，必须避免循环的类层次结构。

youdao

The main problem is that this approach is inflexible; the categorization hierarchy is fixed.

主要问题就是这种方法不太灵活；类别层次结构是固定的。

youdao

The problem here is that it's really, really tedious to both build and analyze this hierarchy.

此处的问题在于构建和分析此层次结构都是非常乏味的。

youdao

Perhaps so, but the larger problem of the Church hierarchy's insularity will take more than a bit of Googling or papal tweeting to address.

WSJ: Review & Outlook: The Papacy After Benedict

By giving him the legendary vote of confidence, the hierarchy would be acknowledging that there is a problem.

BBC: Chick Young's view

Such is the problem with a group like Anonymous, which has no hierarchy.

FORBES: Moneybookers Knocked By Hackers Supporting WikiLeaks