Osteogenin
成骨素
🗣️ 情景例句
Cooking dinner for the entire family is not so easy.
给全家人做晚餐真不是件容易的事。
Altogether it will take ten days to make the trip.
完成旅行将花10天。
It's very smart.Short skirts are in fashion now.
它很时髦。短裙现在很流行。