Endoceratida
内角石目
🗣️ 情景例句
You've lost your family.
你无家可归了。
It's none of my business,but I think you ought to work harder.
它是不关我的事，但是我认为你应该努力工作。
Can't you see? Look! It has an egg in it.
你没看见吗？瞧！里面有一只蛋。