transverse chromatic aberration
横向色差

• underdamping
• underdense
• underdeterminant
• underdevelopment
• underexcitation
• under-exposed
• under exposure
• underlagged
• underload
• undermined-phase technique
• undermodulation
• underquenching
• undersaturation
• undersea ranging
• undershoot
• underspeed
• underswing
• underwater camera
• underwater laser radar
• underwater TV camera
• underwater visibility
• underwater vision
• undeveloped
• undeviated light
• undiffracted wave