Information from this year's study is compared with studies from past NSBA surveys, providing a wealth of useful trend information.
将该年度调查获得的信息与以往NS BA调查结果比较，能得到大量有用的趋势性信息。
Information from this year's study is compared with studies from past NSBA surveys, providing a wealth of useful trend information.
将该年度调查获得的信息与以往NS BA调查结果比较，能得到大量有用的趋势性信息。
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