这就使得下面这条决定是否应该规格化数据的标准很明确：永远不要规格化数据，以免受支持的查询需要执行连结操作来选择记录。

This makes the criteria for deciding if you should normalize data straightforward: Never normalize data such that a supported query will need to perform a join operation to select records.

youdao

在还没有被业界明确接受的标准的情况下，IBM提供两种用户熟悉的方法，用户可以选择其中之一来存储XML数据。

In the absence of a clearly accepted standard, IBM opted to offer its users two familiar means for persisting new XML data.

youdao

不同的油藏地质条件，应该选择什么样的水质，没有明确的标准；

What quality of water should be chosen in different oil reservoir geologic condition, is defect from definite criterion.

youdao