horizontal
(1)地平的
(2)水平的
(3)横的
(4)卧式的

• dichromasia
• dichromat
• dichromated gelatin film
• dichromatic colour vision
• dichromatism
• dichromophore
• dichromtic
• dichroscope
• diclinic
• dicyclobutene
• didymium glass
• didymium glass standard
• die
• die casting
• dielctric-waveguide mode
• dielectic coated grating
• dielectric
• dielectric beamsplitter
• dielectric breakdown
• dielectric coated mirror
• dielectric coated optical flat
• dielectric constant
• dielectric cylinder
• dielectric film
• dielectric layer