light meter [摄] 测光表 ; 曝光计 ; 照度计 ; 测光计
incident light meter 入射式测光表 ; 入射光计 ; 入射光测光表
light flux meter [光] 光通量计
light power meter 光功率计
chopped light power meter 断续光功率计
CdS light meter 硫化镉曝光表
light intensity meter 光强计 ; 照度计
In just a few years, every door lock, card reader, video camera, vehicle, power meter, and light switch will have an IP address — at least in the business world.
数年之内,至少在商业领域,每一个门锁,每一个读卡器,每一个摄像头,电表,甚至是电灯开关都会被赋予一个IP地址。
A second of time, for instance, is now defined in terms of an electron transition of the cesium atom. And the meter is tied to the speed of light.
比如说,秒就是根据铯原子内部的电子跃迁时间来下的定义,而米的定义则和光速有关。
Yes, Something seems wrong with the light meter in my camera.
是的,我的照相机里的曝光表好像出毛病了。
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