photoholen.光穴
photon.照片v.拍照
photoelectric threshold contrast光电阈衬比
Photo-Optical Recorder Tracker照相光学记录跟踪器
Photosynthetic and physiological光合生理
photo-reconnaissance satellite光学侦察卫星
photoeleetroehemical degradation光电催化
photosynthetic carbon metabolism光合碳代谢
photo-type traveling wave tube光电型行波管
phototrophic hydrogen production光合产氢