For example, data classified as "unknown" usually indicates a column that is null or empty and probably not used.

例如，类别为“未知”的数据通常表明一个列只有null值或者为空，可能不被使用。

youdao

The Bureau of Labor Statistics data shows that 2.7million people who wanted and were available for work hadn't looked within the last four weeks and were no longer even classified as unemployed.

劳工统计局的统计数据显示，过去的四周内，有270万想要工作且可以工作的人没有找工作，从而不再被划归成失业人员.

youdao

The Bureau of Labor Statistics data shows that 2.7 million people who wanted and were available for work hadn't looked within the last four weeks and were no longer even classified as unemployed.

劳工统计局的统计数据显示，过去的四周内，有270万想要并且可以工作的人在过去四周内没有找过工作，甚至不再被列为失业者。

youdao

Since much of that data is classified, only a trusted intermediary could get American and Russian defense officials to work together.

FORBES: Beware Of Space Junk

In fact, as the Times account grudgingly documents, Feith's Counterterrorism Evaluation Group did nothing more than subject available classified data to an independent review.

CENTERFORSECURITYPOLICY: America is indebted to Douglas Feith

U.S. and Western intelligence agencies are reviewing classified data showing Israel most likely conducted a strike in the Thursday-Friday time frame, according to both officials.

CNN: SHARE THIS