A method of producing crystal sodium fluoride with sodium fluosilicate and sodium carbonate is introduced.本文介绍了以氟硅酸钠、纯碱为原料生产晶体氟化钠的工艺,并对操作条件作了详细的说明.Compositions, crystallization mechanisms and properties of the fluosilica...
新唱片的封套上不会出现他的照片。There are to be no pictures of him on the sleeve of the new record.他把密封那份电报的封套拆开.He opened the cover in which the message was enclosed.莱门把那包东西顶上的封套撕开.Lyman tore the cover from the top of the package....
One in five young adults was struggling with everyday mathematics.1/5的年轻人做日常的数学计算都费劲。Many of the differences in everyday life remain.日常生活中的许多差异仍然存在。She watches television to relieve the monotony of everyday life.她天天靠看电视来...
One day virtual reality will revolutionize the entertainment industry.有一天虚拟现实将使娱乐业发生革命性的变化。Gambling is a form of entertainment.赌博是一种娱乐。Animation has stopped being eye-candy for kids and geeks and become mainstream entert...
several manned lunar landings几个人类策划的登月计划A milky twilight crept about the stairway and the landings below.乳白的黄昏蹑进楼梯和下面的楼梯口.The road downward has but few landings and level places.下坡路上很少有落脚点和气地.Henry said through the car w...