Phthanite
燧石, 角石, 英石岩
🗣️ 情景例句
Did you go to Michigan too, Grandpa?
爷爷，你也上Michigan吗？
By falling we learn to go safely.
吃一堑，长一智。
Can't you see? They're boxes!
你没看到吗？是一些箱子。