Disphenoid
复正方楔; 双半面晶形
🗣️ 情景例句
This is very helpful, Mrs. Martinelli.
这样很有用， Martinelli太太。
Will the flight be delayed?
这班机会延误吗？
The next stage is to get the elephant to the training establishment,
下一步就是把象带到训练场所，