也许中国应该利用其1.9万亿美元的官方储备来购买更多的外债，但这一巨额资产的很大一部分已经买了外国主权债券，因此任何的增加只能是渐进式的。
Perhaps China should use its $1.9 trillion official reserves to buy more foreign debt, but this huge asset pool is already heavily loaded with foreign sovereign bonds, so any increase can only be incremental.