Permutability
换排性, 转置性, 交换性
✅ 同义词
🗣️ 情景例句
Don't forget to bring me a souvenir.
别忘了给我带回点儿纪念品。
After forty years teaching English he thinks it's time to call it a day.
他教英语四十年，认为该退休了。
Would you like another piece of beancurd?
再吃一块豆腐好吗？