Osteolith
土磷灰石
🗣️ 情景例句
Goodbye, take it easy.
再见，悠着点。
These clothes are very beautiful, but I can't afford to pay that much.
这些衣服很漂亮，但是我买不起。
with their fellow scientists either in other countries or in universities,
和其他国家、其他大学同行们