井研县土地利用时空变化分析。

Analysis of space-time change of land use in Jingyan County.

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井研究此给予用户如进度指示器的视觉反馈的重要性和记录。

The importance of giving users visual feedback, such as progress indicators, has been well researched and documented.

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本文探讨了在核测井研究工作中的理论和实验手段的关系。

The relation between theoretical study and experimental work has been dis-cussed.

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