Osteocalcin
骨钙素；骨钙蛋白
🗣️ 情景例句
I haven't seen you for a long time.
很久没见了。
One chick keeps a hen busy.
一只小鸡已够母鸡辛忙。
From there, he hitchhiked to Paris in a lorry.
从那里他又搭上卡车到了巴黎。