Polyfluocarbon
[化] 多氟烃
🗣️ 情景例句
I'd like to give thanks for Grandpa coming to live with us.
我感谢爷爷到这儿和我们一起生活。
I wake my sister up.
我叫醒我妹妹。
Do you have a calling card?
您有名片吗？