Commutativity
[计] 可交换性
🗣️ 情景例句
That sounds a good idea. Thank you.
好主意！谢谢你。
Do you like going to see painting exhibition?
你喜欢参观画展？
a flight attendant told us to keep calm and to get off the plane quietly as soon as it had touched down.
一位空中乘务员告诉我们要保持镇静，待飞机一着陆，就马上不声不响地离开飞机。