They don't have access to a convertible currency. 他们无法得到可兑换货币。
Of course for now the yuan is not a convertible currency and China has considerable work to do to clean up its financial system before that can change. 当然,人民币目前还不是可自由兑换货币,而在人民币实现可自由兑换之前中国还需大力整顿其金融体系。