Higher harmonics
[电] 高谐波
🧩 词语组成解析
[经] 上扬
n. 乐音学
🗣️ 情景例句
A gift from me.
这是我的一件礼物。
I was thirty on my last birthday.
我在我最后一个生日时30了。
The problem now facing humanity is: What is going to be done with all this knowledge?
用这些知识去做什么？