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
One picture is worth a thousand words.
百闻不如一见。
Loftiest trees most dread the thunder.
树大招风。
It wasn't easy to win the match. No. 64 Middle School is really a strong team.
赢这场球不容易。第64中学的的确是一支强队。