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
From me and Marilyn.
Marilyn和我送的。
Sorry, but she's busy then too.
对不起，那会儿她也没空。
These things happen all the time.
这是常有的事。