Polyfluoroethylene
聚氟乙烯
🗣️ 情景例句
At least you've got a roof over your head.
至少你现在有电瓦遮头。
Maybe mine is the bigger.
我的或许更大些。
Sally was very excited because she had never travelled on a train before.
萨莉非常激动，因为她从未乘过火车。