the fact of being full of light or of shining strongly 光线充足的;明亮的 She was momentarily blinded by the brightness of the room. 房间的明亮使她一时看不见东西。
how bright something is 亮度: 某物有多亮to adjust the brightness (= for example, on a TV set) 调节亮度 As the brake is applied, the light increases in brightness. 当刹车时,灯光亮度增加。
the quality of being bright in colour 亮度: 颜色鲜艳的质量Repeated use of some washing powders can lead to a loss of brightness in colours. 重复使用一些洗衣粉会导致颜色亮度下降。
a cheerful and lively attitude or way of behaving 亮度: 开朗活泼的态度或行为方式Her brightness and energy kept us all together. 她的聪明和精力让我们团结在一起。
the quality of being intelligent and quick to learn 聪明的;悟性强的 The brightness of these students isn't in doubt. 这些学生的聪明是毋庸置疑的。