secondary
(1)第二级的，次级的
(2)副，次
(3)副线圈

• distant control
• distant shot
• distant view photograph
• distillatio
• distillation film
• distilled water
• distinctness
• distinot vision
• Distometer
• distorition
• distorted lattice
• distorted wave
• distortion factor
• distortionless
• distortionless telephoto objective
• distributed Bragg reflector
• distributed circuit
• distributed feedback
• distributed-feedback dye laser
• distributed feedback laser
• distributed-feedback semiconductor laser
• distributed paramp
• distribution
• distribution board
• distribution photometer