fluctuation
(1)起伏，波动，脉动
(2)升降，涨落

• photoelectron emission device
• photoelectron escape teim
• photoelectronic device
• photoelectronic tansducer
• photoelectron spectroscopy
• photoelectrophoretic camera
• photoeleectric electron multiplier tube
• photoeleectric polarimeter
• photoelement
• photo-elimination
• photoemf
• photoemission
• photoemission current
• photoemissive cell
• photoemissive detector
• photoemissive device
• photoemissive element
• photoemissive surface
• photoemissivity
• photoemitter
• photoemulsion
• photoenergetics
• photo energy
• photoengraving
• photoetching