Sr, the necessary trace element for human body, is the normal comprisement of bones and teeth.

锶是人体必需的微量元素，是骨骼和牙齿的正常组成部分。

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Rangos Sr. Research Center, researchers were able to identify pericytes in all human tissues they analyzed, including muscle, fat, pancreas, placenta and many other samples.

Rangos Sr。 研究中心的实验室，研究人员在他们所有分析的人体组织中鉴定出周细胞，包括肌肉，脂肪，胰腺，胎盘和许多其他标本。

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