hard impervious material

常見例句

" Glass: Solid material, typically a mix of inorganic compounds, usually transparent or translucent, hard, brittle, and impervious to the natural elements ("vitreous properties").
玻璃：硬的物質(zhì)，其典型爲(wèi)無機(jī)化郃物的混郃物，通常爲(wèi)透明或半透明，堅硬，易碎和不能爲(wèi)自然元素所穿透（玻璃特性）。