Declines in the stock markets especially the Dow and renewed fears about the state of the banking system provided some extra negative features for the oil trading.

股市特别是道指的跌落和市场对于银行系统的担心对原油市场也产生了一些额外的负面影响。

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That means acute negative features of an economy can persist for decades, once they slip off the main agenda.

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They, among other things, cannot have certain risky features like negative-amortization, where the amount owed actually increases for some period because the borrower does not even pay the interest and the unpaid interest gets added to the amount borrowed.

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