着重评介了铝镍钴系永磁材料 、 铁氧体永磁材料 、 稀土永磁材料和粘结永磁材料四大系列.Emphatically reviewed four systems of permanent magnet material : Al - Ni - Co magnet, ferrite magnet, rare - magnet and glue magnet.特殊工业陶瓷、磁性材料及制品, 包括氧化锆 、 氧化铝材料制作的机械件, 钕铁硼、铝镍...
有一颗小行星可能会与地球发生碰撞。There is an asteroid on a collision course with the Earth.小行星, 亦称为 “ 小型行星 ”, 在外太空中不计其数.Asteroids, also known as " minor planets ", are numerous in the outer space.最大的小行星是谷神星,体积约为月球的1/4.The largest astero...
His eyes are going; he says he has glaucoma.他的视力在下降，他说自己得了青光眼。It is of great importance to recognize patients who are predisposed to narrow - angle glaucoma.识别患者是否有窄 角型 青光眼发病倾向非常重要.Systemic use of the anti - muscarinic a...
亚瑟王的故事成为口头传说的一部分。The story of King Arthur became part of oral tradition.在梅林的建议下，亚瑟王创建了圆桌骑士团。At Merlin's instigation, Arthur founds the Fellowship of the Round Table.他沿着亚瑟大街精疲力竭地跋涉。He trudged wearily down Arthur Stre...