Triality
三隅对称性
🗣️ 情景例句
You don't need to do that.
你不用那么做的。
I slipped on the stairs and fell down.I broke my leg.
我在楼梯上滑倒了并且掉下来我弄断了腿的。
Though he is young, he knows a lot.
尽管小，他懂得多。