brightness
/ˈbraɪtnəs/📚 8108六级the quality or state of giving out or reflecting light. "we can change the brightness of the bulb"
noun [具体名词][光][天] 亮度；聪明，活泼；鲜艳；愉快
The star varies in brightness by about three magnitudes.
星体的亮度大约分三个星等。
- brightness 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 55 From the earth:Greetings
单词造句: