Etfe
[医][=ethylene-tetrafluoro-ethylene]乙烯四氟乙烯
🗣️ 情景例句
Five hundred dollars, please. And could you give me ten dollar in small change?
请换500美元。再另外能否给我10元的小面额零钱？
Many heads are better than one.
集思广益。
I'm afraid I'm still not very good at it, though.
不过，恐怕我的汉语还是不够好。