三色性某些礦物質(zhì)所具有的特性，當放在白光下從三個(gè)不同的方向觀(guān)察，會(huì )呈現出三種不同的顏色
The property possessed by certain minerals of exhibiting three different colors when viewed from three different directions under white lights.
棱鏡這種形狀的透明體，多為玻璃制成，通常兩端為三角形，用來(lái)分解穿過(guò)柱體的白光，使光束發(fā)生色散或用來(lái)反射光線(xiàn)
A transparent body of this form, often of glass and usually with triangular ends, used for separating white light passed through it into a spectrum or for reflecting beams of light.
白熱的熱得以致于發(fā)出明亮的白光
So hot as to glow with a bright white light.
