Etfe
[医][=ethylene-tetrafluoro-ethylene]乙烯四氟乙烯
🗣️ 情景例句
All right!
好啦！
To have a discussion with the committee
在委员会讨论
Last week No.14 Middle School held a sports meeting on the playground.
上星期第十四中学在操场举行了一次运动会。