Again, on the subject of invention, Edison wrote, "Months of intense watching, study, and labor are requisite before commercial success or failure is certainly reached."

在讨论发明时，Edison 写道，“必须经过数月的艰苦观察、研究和劳动，才能让产品经受市场的考验。”

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For the study, funded by a grant from the National Science Foundation, the researchers relied on interviews conducted on behalf of the U.S. Bureau of Labor Statistics.

该研究由美国国家科学基金会出资赞助，研究人员所用采访来自代表美国劳工统计局所制作。

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This dissertation is a case study on the labor process of female migrants in service industry.

本文是对服务业女性农民工劳动过程的一项个案研究。

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Sources: the Bureau of Labor Statistics, the Kaiser Commission on Medicaid and a study of state worker pensions done in 2009 by two academics, Joshua Rauh and Rovert Novy-Marx.

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In 1901, according to a 1997 Bureau of Labor Statistics study, the average family spent almost half of their budget on food.

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In 2004 an official study group said efficient water management through micro-irrigation could help many save on fertilizer and labor, as well as the precious liquid itself.

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