Vibratom
振动磨机; 振动球磨机
🗣️ 情景例句
My dear little boy just looked up at me as if to say,
我亲爱的小男孩只是仰头看着我 ，好像在说，
Live to learn and learn to live.
生而学之，学而生之。
I can't read it!
我看不懂这封信，