Fluorizating agent
[化] 氟化剂
🧩 词语组成解析
🗣️ 情景例句
since ten this morning,
从今天上午十点起，
To make enemies, talk; to make friends, listen.
要成仇敌，多讲；要成朋友，多听。
I was only five when my father had taken me abroad, and that we eighteen years ago.
我5岁那年，父亲就带我出了国，那是18年前的事了。