Phosphocalcite
轻斜磷铜矿
🗣️ 情景例句
He couldn't teach such dull children.
他教不了这么笨的孩子。
Life is full of ups and downs.
人生沉浮多。
The real dividing line between continents and oceans occurs at the foot of a steeper slope.
大陆和海洋的真正分界线是在陡坡脚大陆架慢坡