Toothbrushing
(toothbrush 的现在分词) n. 牙刷
🗣️ 情景例句
Have you ever been to Nanjing?
你曾去过南京吗？
Take a bad spill!
跌个狗吃屎！
It is bacteria that have generated the oxygen we breathe on earth.
正是细菌生产出我们在地球上呼吸的氧气。