Spectrum utilization characteristics
[电] 光谱利用特性
🧩 词语组成解析
n. 特性, 特征；特质；特色（characteristic的复数）
🗣️ 情景例句
How nice to meet you.
认识你真高兴。
My sister has been engaged for two months.
我的姐姐订婚有2个月的时间了
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低点）、浪高（从波谷到浪峰的垂直距离）