a nose to light candles at
response curve of photosynthesis to light
Response characteristics to light
Respondence to the Price of Electric Power
reduce the pressure to saving electric
reaction of pupil to light
ratio of output value to unit electric energy consumption
ratio of light weight to loading capacity
Ratio of electric charge to mass
PV Will Develop To Large Scale
percentages of transmitting knife-edge light power to the total power
one able to do light manual labour only