He had a neat idea and that was to give letter grades to securities that represented credit worthiness.
他有个绝妙的主意，就是用字母，给证券评级，以此来代表其信用状况。
When I open the blue book, the Yale guideline, the Yale catalog, it's got a page, as you all know, where it says what letter grades mean at Yale.
我打开那本蓝皮书，耶鲁指导手册，耶鲁目录，有这么一页，都见过，讲耶鲁每个评分字母表示什么。
As a result, some American Montessori schools now issue letter grades just as non-Montessori classes do.
因此，有些美国的蒙氏学校现在按字母等级评分，跟非蒙氏班级一样。
Similar stickers already exist in states like California and Vermont, though they use Numbers rather than letter grades.
类似的油耗标签等级已经在加利福尼亚州和佛蒙特州出现，不过这些州用的不是字母而是数字。
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