So this paper has carried on the lab research of ultra-low density cement slurry system.

为此本文进行了超低密度水泥浆体系的实验研究。

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Studies show that surface sediments of the flood land seem to be the best sampling media in ultra-low density geochemical investigation in forest-swamp areas.

研究成果表明，河漫滩表层沉积物是森林超低密度地球化学调查的最佳采样介质。

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We forecasted potential of gold mine resource in Wulaga Au geochemical block in the north of Jiamusi block by using the method of ultra-low density geochemical survey.

运用超低密度地球化学调查方法，对佳木斯地块北缘乌拉嘎金地球化学块体的金矿资源潜力进行了预测。

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Those numbers explain why power density matters so much: if you start with a source that has low power density, you have to compensate for that low density by utilizing more resources such as land, steel, and ultra-long transmission lines.

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