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
You will never guess.
你绝对猜不到。
I'm not sure what time I'm coming back.
我不肯定我什么时间回来。
How much more?
多多少。