Tetartohedral
a. 具有四分之一結晶體對稱面的
??? 情景例句
You won't believe this,
簡直不會相信，
You're very kind to take the trouble to help me.
謝謝你不怕麻煩幫助我。
People change, but they don't suddenly chnge from being right-handed to being left-handed.
人會變，但他們不會從慣用右手而突然轉變成左撇子的。