Dihedrals
(dihedral 的復數) a. (數)二面的\\nn. 兩面角
??? 情景例句
my brother Robbie,
我弟弟Robbie
If it doesn't rain tomorrow, will you come to see me?
如果明天不下雨的話，你會來看我嗎？
He's only forty-one years old, and he has already been to nearly every country in the world.
他只有41歲，但他卻過世界上幾乎每一個國家。