lu
men
复数形式
lumens
1
管腔, 管状器官中的空腔或通道
a cavity or passage in a tubular organ
2
流明, 测量光亮的单位
a unit measuring the brightness of light
- 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。
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