Commutativity
[计] 可交换性
🗣️ 情景例句
Why not give the people of Riverdale a clear choice?
为什么不让Riverdale的人民有一个明确的选择呢？
It is good to have friends in trouble.
在患难时得到朋友是幸运的。
I get up at six o'clock.
我六点起床。