Polyfluoride
多氟化物
🗣️ 情景例句
You've got the wedding-day jitters!
已经得了婚礼紧张症了！
Keep your body clean!
身体要常保持清洁。
Suddenly she asked her father why he kept so many old newspapers locked away there,
她突然问父亲为什么把这么多的旧报纸锁在柜子里，