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The dimensions of the particular item and user space are helpful in deciding whether to use an item-based or user-based approach.
了解具体item和用户空间的规模，对于我们在决定是采用搜索item检索还是采用户行为分析检索有非常大的影响。
You can also click a menu item to expand it and browse all of the available metrics or dimensions.
您也可以点击菜单项，将它展开，并浏览所有可用的数据或层面。
Methods According to 10 theoretic dimensions of PTIQ, item pool was developed.
方法根据PT IQ的10个理论维度，编制原始条目池。
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