Polyfluoride
多氟化物
🗣️ 情景例句
Oh, fine, fine. Be here a few minutes early.
啊， 好， 好。请早几分钟到这。
He did it in no time.
他马上把那事给做了。
For one thing they keep the water clean.
一来，水下植物可以保持水的清洁。