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
Did they write some bad news?
他们写了什么坏消息吗？
It's quite cold today.
今天天气相当冷。
After I had sat down, he said that business was very bad.
待我坐下后，他说生意非常不景气。