off-resonance effect
非共振效应，失谐效应

• mercury pool mirror
• mercury-rare gas laser
• mercury reflector
• mercury shot arc lamp
• mercury thermostat
• mercury vapor light source
• mercury vaporu discharge lamp
• mercury vapour lamp
• mercury-xenon arc lamp
• meridian
• meridian aberration
• meridianal coma
• meridianal curvature of field
• meridianal focal line
• meridianal focus
• meridianal image surface
• meridianal mode number
• meridianal oblique spherical aberration
• meridianal plot
• meridianal ray
• meridianal ray plot
• meridianal reflexion
• meridian angular aberration
• meridian circle
• meridian direction