单词学习：brightness 名词
brightness
/ˈbraɪtnəs/
亮度；明亮；聪明
The brightness of the projector in Mr. Gu's classroom allows every student to see the presentation clearly.
顾老师教室里的投影仪亮度很高，让每个学生都能清楚地看到演示文稿。
单词卡片
卡片已就绪
