The researchers found that all of the animals on the low-calcium diet lost bone density on the periodontitis-affected side of the mouth.

研究人员发现在低钙饮食组，所有动物受牙周炎影响一侧的口腔骨密度均发生降低。

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So-called serpentine soils, for example, are deficient in calcium, and only plants able to tolerate low levels of this mineral can survive.

例如，所谓的蛇形土壤缺乏钙，只有对低水平的这种矿物质耐受的植物才能生存。

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All sheep received restricted diet with low calcium and phosphorus during experiment.

所有羊进行严格的低钙、磷喂养，在实验的饮食习惯。

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Dolomite is also a low-cost way to supply calcium to young tomato plants.

VOA: special.2011.06.14

Half made no change in their diets, while the other half increased calcium from low-fat dairy foods to about 1500 milligrams a day.

CNN: Study says calcium may cut colon cancer risk

Proponents also point to a recent study published in JAMA, which found that high-energy shock waves were better than low-energy waves in treating patients with shoulder tendinitis resulting from calcium deposits.

FORBES: The Big Hurt