red [colo[u]r]
(1)红色，赤色
(2)红色的

• ideal filter
• ideally-reflecting
• ideal observer
• ideal polarization rotator
• ideal radiator
• ideal scanning
• ideal value
• identical graduation
• identification
• identification friend or foe (IFF) system
• identification signal
• identifier
• identity
• identity relation
• idiochromatic
• idiochromatism
• idiolelectric
• idiophanism
• idler
• idler absorption
• idnetification testing
• ifomration accumulation
• ignition
• ignition temperature
• ignitor discharge