When something rattles or when you rattle it, it makes short, sharp, knocking sounds because it is being shaken or it keeps hitting against something hard. 使发出嘎嘎声; 发出嘎嘎声
If something or someone rattles you, they make you nervous. 使紧张 • Officials are not normally rattled by any reporter's question. 官员们一般不会因为任何记者的提问而紧张不安。