zone of opacity
(1) 不透明带，不透明区
(2)暗带，暗区

• chilling
• chime
• Chi Mei Optoelectronics Corp
• Chinese character generator
• chinographic prjoection
• chinopyramid
• chiolite
• chiolite film
• chip
• chipping
• chips of glasss
• chirp
• chirped
• chirped-grating
• chirped picsecond pulse
• chirped pulse
• chirping
• chirping pulse
• chirp radar
• chloraoaluminium
• chlorate
• chlorbobenzene
• chloride
• chlorine
• chlorinity