Osteogen
成骨质
🗣️ 情景例句
Help yourself, please.
请随便。
Without method, little can be done to any good purpose.
不讲究方法，办事就没有成效。
so I got a ladder from the shed in the garden, put it against the wall,
于是，我从花园的小棚里搬来了一个梯子，把它靠在墙边，