我们对住房贷款抵押证券评级标准作出调整，使得这些债券更难获得AAA级评级。

For instance, we have made changes to our criteria for rating mortgage securities so that it will be much more difficult for such a security to receive a triple-A rating.

youdao

我们对住房贷款抵押证券评级标准作出调整，使得这些债券更难获得AAA级评级。

For instance, we have made changes to our criteria for rating mortgage securities so that it will be much more difficult for such a security to receive a triple-A rating.

youdao