Osteocalcin is a structure protein synthesized by osteoblasts. This protein becomes carboxylated through post-translation processing and plays roles in skeleton development.

骨钙素是一种由成骨细胞合成的结构蛋白，经过翻译后加工生成羧化骨钙素而参与骨骼发育。

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Objective to detect pregnant women's blood of superior thyroid artery in the second trimester of pregnancy through color ultrasound, to evaluate fetus skeleton development in uterus.

目的经彩超检测妊娠中期孕妇甲状腺上动脉血流，用于评估宫内胎儿骨骼发育。

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