adj. impervious
辐射线不能透过的物质叫不透明体。
Materials through which no radiation is propagated are called opaque.
射线能透过太阳光线所不能透过的一些东西。
The X-rays penetrate things which the rays of the sun cannot.
纱裙一直从脸罩到脚；透过它，她能看得见外面，但我们不能看到她的脸。
The veil came from her head to her feet; she could see out through it, but we could not see her face.
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