brightness

/ˈbraɪtnəs/📚 8121 63六级
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。

-ness 表名词,“性质,状态,”通常加在形容词后面brightness n. 光明(bright 光明的)
brightness 出现在下面的课文中
Lesson 55 From the earth:Greetings
单词造句: