brightness
n. [光][天] 亮度；聪明，活泼；鲜艳；愉快
例句
The star varies in brightness by about three magnitudes.
星体的亮度大约分三个星等。
《牛津词典》
Her burst of exuberance and her brightness overwhelmed me.
她的活力勃发和她的聪明智慧征服了我。
《柯林斯英汉双解大词典》
But his night paintings don't exactly lack brightness.
但他的夜景画并不缺乏亮度。
