Speaker efficiency
[电] 扬声器效率
🧩 词语组成解析
speaker
['spikɚ]
n. 说话者;演讲者，发言人;讲某种语言的人;扬声器;
🗣️ 情景例句
That's like closing the gate after the horse has bolted.
那无异于马后炮。
Have you been busy with schoolwork?
学校的功课很忙吗？
His parents did not know what was wrong.
他的父母亲不知道他有什么毛病。