While there is a great degree of flexibility in exchange rates according to balance of payment factors, central banks still intervene in the market by buying or selling large amounts of foreign currencies to prevent wideranging fluctuations.

• 虽然按照国际收支差额的因素，汇率有很大程度的灵活性，但中央银行仍然使用买进或卖出大量外币的办法来防止大幅度的外汇浮动，以此来干预外汇市场。