Osteocalcin
骨钙素；骨钙蛋白
🗣️ 情景例句
Should children be allowed to watch violent movies?
小孩可以看暴力片吗？
I want to be a journalist after graduation.
毕业后我想当记者。
What colour's your new dress?
你的新边衣裙是什么颜色的？