欧洲央行可以出售欧元债务，换回欧元，然后让它们消失；
You simply reduce the number of euros in existence: The ECB would sell euro debt, take euros in return, and make them disappear.
如果愿意，也可以出售美元债务，然后在外汇市场上卖出美元换回欧元，然后让它们消失。
If you like, you could even sell dollar debt, then sell the dollars in the foreign exchange market and buy euros, and make those euros disappear.
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