Fef
abbr. fast-extrusion furnace 快速喷炉
🗣️ 情景例句
about your math teacher or your math homework.
你的数学老师或你的数学作业。
That's incredible!
简直难以相信！
I used to travel by air a great deal when I was a boy.
我在幼年的时候，曾多次乘飞机旅行。