他们担心更多的坏消息，诸如债券保险 信用 等级评级调低，会引发恶性循环。
They feared more bad news, such as the downgrading of bond insurance, could set off a nasty downward spiral.
这是至关重要的，因为如果债券收益大幅提高，就会引发外债偿还成本和债务上升的恶性循环。
That is vital; if gilt yields were to rise sharply it could lead to a vicious circle of rising debt-servicing costs and higher debt.
在2007年至2008年食品价格上涨期间，一些国家实施出口禁令，引发了一个推高大宗商品价格的恶性循环。
The imposition of export bans during the food price increase of 2007-2008 created a vicious circle that drove commodity prices higher.
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