Oxyfluoride
氟氧化物
🗣️ 情景例句
I arranged to give a party at my house in her honor.
我在我家为她安排举行了一个聚会。
Rear sons for help in old age; and store up grains against famine.
养儿防老。
But as the paper moved from side to side under the pen point,
由于纸在笔尖下来回运动，