单词	拍拍翅膀
释义	拍拍翅膀 flap wings；beat wings
随便看	optical noise origin optical nonlinearity optical nonlinear loop mirrors optical non-uniformity optical normal line optical novelty filter system optical nuclear polarization optical null method optical null point optical null principle optical-null spectrophotometer optical null system optical numerical aperture optical nutation optical object optical objective optical observation optical observation of satellite optical oceanography opticalog transform technique optical opacities optical opacity Optical open loop detection optical-optical double resonance optical orbital rendezous apparatus