Tetrafluoroethylene
四氟乙烯
🗣️ 情景例句
They've always got an opinion.
他们总有自己的看法。
Happens all the time.
常有的事。
Radio and television have made it possible for advertisers to capture the attention of millions of people in this way.
电台、电视使做广告的人可以用这种手段吸引成百万人的注意力。