Periaementitis
牙周膜炎
🗣️ 情景例句
No advertising material.
谢绝广告。
She never showed up.
她一直没有出现。
He wrote books about communism. He said that all communists should help each other.
他写了不少关于共产主义的著作。他说所有的共产党人都应该互相帮助。