而且美联储保留了一项权利，当被抵押的抵押品质量变坏时，可以要求更换其它资产。
And the Fed reserves the right to demand other assets if pledged collateral turns bad.
强调从完整性到“适合目标”的其中一项内容的质量变更。
Emphasis for quality changes from a focus on completeness to one of "fit for purpose."
据巴西的一项试验显示，在放出大量变异昆虫后数月内，未经变异的该类昆虫数量会大幅下降。
A trial in Brazil suggests that releasing swarms of modified insects can reduce the unmodified population in months.
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