A: This is a difficult question, and there are no universally valid answers.
答：这的确是一个难题，而具有普遍性的答案并不存在。
It is very difficult to configure and there are no documented procedures.
配置它非常困难，而且过程没有文档说明。
No matter how difficult your situation may be you are alive now and there is no treasure more precious than life itself.
不管你现在生存的处境多么困难，任何财产都比不上生命本身的价值。
If there are no trees, it would be difficult for human survival.
如果没有树，人类将难以赖以生存。
If there are no trees, it would be difficult for human survival.
如果没有树，人类将难以赖以生存。
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