Spectral density
[电] 频谱密度
🧩 词语组成解析
spectral
['spɛktrəl]
adj. （似）鬼的;幽灵的;谱的;光谱的;
🗣️ 情景例句
Would you kindly hold these keys, please?
请帮我拿一下钥匙。
Well, it's too bad that you have to go.
哦，真遗憾，你一定要走。
Why did you shave it off?
你为什么把它刮了？