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
Uh, in a way.
嗯，是呀。
I'm going shopping because I need to buy some clothes.
我要去购物，因为我需要买一些衣服。
its action depends on the surface, water or ground, over which it rides.
它的飞行取决于它所悬浮的水面或地面。