This is a powerful affirmation of America's strengths, but the problem is that they ensure that the U.S. will not really face up to its challenges.
这是对美国强大的证明，但是问题是他们使美国不能真正面对挑战。
But it struggled to agree on a valuation of Prodeco with Xstrata, and would presumably face the same problem with its other assets-meaning a merger would be tricky to negotiate.
但是它非常同意Prodeco对于斯特拉塔的估价，并且它可能会面临与其它资产相似的问题，这意味着并购也许要进行复杂的商讨。
Therefore, how to reinforce pit slope after its loss of stability, collapse and slide is a key problem which designer, builder, supervisor and manager who are engaged in pit engineering have to face.
因此，如何对已发生基坑边坡失稳、垮塌、滑动破坏等事故的加固处理是每个从事基坑工程设计、施工、监理以及管理人员面临解决的主要问题。
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