Sometimes these risky debt structures can create virtuous circles in which good economic news causes structural reductions in the debt burden,but they can quickly change into vicious circles when external conditions change.

• 有时，这些危险的债务结构可能造成良性循环，使经济方面的良好发展导致债务负担的结构性缩减，但是一旦外界环境发生改变，它们可能会迅速转变为恶性循环。