Crystals having this property are said to be doubly refracting , or birefringent.具有这种性质的晶体叫做双折射晶体.Such substances are optically anisotropic and birefringent.这种材料是光学各向异性的,因而是双折射晶体.The stressmeter consists of a short solid...
Norwegian whalers said yesterday they had harpooned a female minke whale.挪威的捕鲸人说昨天他们用捕鲸叉捕获了一头雌性小须鲸。He said he once harpooned a 2 , 000 - pound shark off the coast of New York.他称,他曾经在纽约海面上,用鱼叉捕获过一条重达2.000磅的鲨鱼....
His voice was harsh as he enunciated each word carefully.他一字一顿,听上去很生硬。She enunciated each word slowly and carefully.她每个字都念得又慢又仔细。His voice, cold and perfectly enunciated, switched them like a birch branch.他的话口气冰冷,一字一板, 有...