Trihedral
a. 有三面的
🗣️ 情景例句
Rules are meant to be followed, not broken.
规则制订出来是让人遵守，而不是让人破坏。
May I have your name, please?
请问你叫什么名字？
It's a pity I didn't think of it earlier.
很可惜，我没有早一点想起这事来。