principal polarizaiton plane
(1)主极化面
(2)主偏振面

• multimode optical fibre
• multimode oscillation
• multimode step-index fibre
• multinomial
• multiorbit flight
• multipactor effect
• multipass
• multipass Fabry-Perot spectroscopy
• multipass interferometry
• multipass laser
• multipass telescopic amplifier
• multipdynode electron multiplier
• multiphase
• multiphnono relaxation
• multiphonon
• multiphonon absorption
• multi-photocatode image converter
• multiphoton
• multiphoton absorptpion
• multiphoton -effect
• multiphoton excitation
• multiphotonic spectroscopy
• multiphoton ionization
• multi-photon microscopy
• multiphoton transition