Triality
三隅对称性
🗣️ 情景例句
That sounds like a good idea.
似乎是个好主意。
We have an extended warranty available at extra cost.
对于额外价钱我们有较长的保证期限。
Squeezing through a cleft in the rocks, the pot-holers arrived at an enormous cavern, the size of a huge concert hall.
洞穴探险者从岩石缝里挤身过去，来到一个巨大的洞里，其大小相当于一个音乐厅。