Neosepta
一种离子交换膜
🗣️ 情景例句
The mailman just dropped some mail in our box, Grandpa.
邮差刚刚塞进一些信件在我们的信箱， 爷爷。
May I have a receipt?
我可以要一张收据吗？
But Mr. Green says: It is better to give than to receive.
“给予比接受好。”