Disphenoid
复正方楔; 双半面晶形
🗣️ 情景例句
There is an emergency. Please send a fire engine.
这有火灾，请尽快派消防车来。
Proverbs are the wisdom of the ages.
谚语是时代的智慧。
There is a boat in the river.
河里有一条船。