Mechanical vibration
[计] 机械振动\\n[化] 机械振动
🧩 词语组成解析
🗣️ 情景例句
and tell us all about it during lunch.
一面吃午餐 ，一面告诉我们一切。
By the time we got there,the play had already begun.
等我们到那里，戏已经开始了。
His telescopic observations are justly immortal;
伽利略用望远镜所作的观察确实是不朽的，