Osteogen

成骨质

🗣️ 情景例句

I'm Elsa Tobin. How do you do?
我叫Elsa Tobin ,你好。
He is a doctor. He has his own practice.
他是个医生,他自己开业。
He had known that it was not safe to travel alone in the forest near the coast.
也听说过独自一人在海边的森林里走是不安全的。
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