Formic acid efficiently dissolves and removes calcium based deposits, as well as rust, scale and iron oxide deposits.

甲酸能有效地溶解和去除钙质沉积物，包括锈、水垢和氧化铁沉积物。

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The author summarizes the practicability of calcium based desulfurizer addition through sulfur content analysis in liquid steel and slag after adding calcium based desulfurizer in the ladle.

通过对盛钢桶加入钙基脱硫剂后钢水和钢水渣中的硫含量分析，总结出加入钙基脱硫剂的实用性。

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The technology of As retention with calcium-based materials and the research progress of As pollution control inc.

进一步讨论了天然钙基材料燃煤固砷技术及燃煤砷污染控制的研究现状。

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In 2010, the IOM raised the amount of vitamin D Americans should consume to 600 international units per day from 200 for most children and adults, based on evidence that vitamin D and calcium protects bones.

WSJ: Swedish Study Links Multiple Sclerosis to Vitamin D Levels

To come up with his index, Drewnowski ranked foods based on their concentrations of nine essential nutrients (protein, fiber, calcium, iron, magnesium, potassium, vitamins A, C, E).

FORBES: Cheap Foods That Are Good For You