然而，当研究人员将两项技术一并运用于牙齿上，他们意识到外消旋化提供了一个额外的有用细节，能成为个体死亡年龄的良好衡量标准。
However, when the researchers applied both techniques to teeth, they realized that the racemization offered an additional useful detail, a good gauge of an individual's age at death.
虽然顶层收入的人的财富来源有待争议，但是国会预算办公室（CBO）还是对此提供了一些有用的细节。
The causes of the good fortune of those at the top are disputed, but the CBO provides some useful detail on that too.
这个类图如果没有抽象关系的细节将不再像以前那样有用。
This class diagram is not useful without the details of the abstract relationships.
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