美国资深参议员已警告国会，目前有“太多交易”在没有监管的情况下进行。
Senior US senators have warned congress that "too many trades" are occurring without regulatory oversight.
瑞安说，他和罗姆尼将“以严肃的方式面对严重的挑战”，但他同时警告说，美国的经济问题是如此之大而没有太多的时间来解决这些问题。
Ryan said he and Mr. Romney will "meet serious challenges in a serious way" but warned the country's economic problems are so big that there is not much time to fix them.
金融危机的发生历史表明，由盛入衰的转折点可以来的很快，而且没有太多的先期警告。
The history of financial crises shows that turning points can come swiftly and without much warning.
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