And also, the study level and the development tread and prospect is described.

同时，对船闸的研究水平、发展趋势和前景作一展望。

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Each type can be divided into sub-series or son-series with the difference of study level.

每一类型都具有一定的层次，依研究程度的不同可以划分到亚系列和(或)子系列。

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Based on study object, study level, and study realm, the subject system of land science can be constructed into a three dimension system.

土地科学学科体系可从其研究对象、研究层次和研究领域三个方面构建为一个三维立体体系。

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That study used computers and current ice-level information to predict future ice levels.

VOA: special.2009.05.05

"Traditionally,study in America has been overwhelmingly at the graduate level.

VOA: special.2010.11.18

The bill is the product of a three-month Cabinet-level study to determine a national energy strategy.

CNN: House OKs bill to drill in Arctic reserve

Universities have complained that the current A-level system does not stretch pupils sufficiently or give them the intellectual independence and curiosity needed for degree-level study.

BBC: A-level students facing shake-up

In Boston, where 23-year-old Lu Lingzi enrolled in graduate-level study in statistics, friends and teachers remembered her as an exceptional student and an exuberant personality who delighted in spring blossoms and culinary treats.

NPR: Chinese Bomb Victim Went To Elite School In China