Impenetrable by light; neither transparent nor translucent.
不透光的不能被光线穿透的；既不透明也不是半透明的
Some objects do not allow light to go through them.
有些物体是不透光的。
You can cover your eyes with an opaque eye mask.
你可以用不透光的眼罩把眼睛蒙
a light-proof box with a lens at one end and light-sensitive film at the other.
一头有镜头另一头有胶片的不透光的箱子。
Translucent or transparent.
透光的透光的或透明的
Emergent light is no longer continuous.
透过的光不再是连续的。
The sun's rays could not wedge their way through the barrage of foliage.
阳光透不过树叶的屏障。
Film stored in lightproof containers.
装在不透光盒的胶片
Opacity: Degree of obstruction to transmission or reflection of light.
不透明度:阻碍光线透过的程度。
optical transmission density
光学透射密度，即光学玻璃或器材的透光程度，是不透明度的对数
The degree of optical opacity of a medium or material, as of a photographic negative.
不透光度一定介质或材料（例如照相感光纸）的不透光程度
glazed earthenware decorated with opaque colors.
用不透明的颜色装饰的光滑的土陶。
The glowing screen showed that the rays could pass not only through black paper but also through wood.
发光的屏幕表明该光线不仅能穿透黑纸，还能穿透木头。
a gemstone having the property of transmitting light without serious diffusion.
能够透光但漫射不强的宝石。
The sunshine could not penetrate where the trees were thickest.
阳光不能透入树木最浓密的地方。
not transparent to X-rays or other forms of radiation.
对x光或者其他形式的射线不透明。
A chemical solution opaque to x-rays.
一种x光不能穿透的化学物质，
Effect of Opacity on the Maximum Absolute Bolometric Magnitude of Ia Supernova
不透明度对Ia超新星极大光度的影响
