Illuminance of illuminating radiation is always measured in photometric units.照明辐射的照度通常是以光度为单位.It's a science in that it can be measured by results and is subject to methodological analysis.说它是科学,因为它可以通过结果来衡量,并须经方法论...
The Egyptians probably measured their day in twenty-four hours of unequal length.埃及人很有可能用不同长度的24小时来度量日子。He measured the speed at which ultrasonic waves travel along the bone.他测出了超声波穿过骨头的速度。The packets are measured to red...