extraterrestrial radiation
地球外的(行星际的)辐射

• lamp socket
• lamp switch knbo
• lamp wire
• Land
• Landasat
• Landau shift
• landing angle
• Landing light system
• Landolt band
• Landolt ring
• land surveying
• Lang camera
• langley
• Langmuir dark space
• Langmuir probe
• Languir turbulence
• lanscape lens
• lantern
• lanthanide
• lanthanide elements
• lanthanum
• lanthanum beryllate laser
• lanthanum crown glass
• lanthanum flint glass
• lanthanum fluoride