Lumen
01
管腔, 管状器官中的空腔或通道
a cavity or passage in a tubular organ
02
流明, 测量光亮的单位
a unit measuring the brightness of light
例子
The projector has a high lumen output, making it perfect for outdoor movie nights.
投影仪具有高流明输出，非常适合户外电影之夜。
When choosing a flashlight, consider the lumen rating to determine its brightness.
选择手电筒时，考虑流明等级以确定其亮度。
