Permutoid
[化]交换体
🗣️ 情景例句
Oh, you're a real Stewart!
噢， 是一个真正Stewart家的人
Happy is he who knows his follies in his youth.
记得青年时所做的愚笨事的人是幸福的。
who is which depending on whether the customer's account is in credit or is overdrawn.
究竟谁是债务人谁是债权人，要看储户的账户是有结余还是透支。