英语翻译As the horizons of science have expanded,two main groups

英语翻译
As the horizons of science have expanded,two main groups of scientists have emerged.One is the pure scientist; the other,the applied scientist.
The pure or theoretical scientist does original research in order to understand the basic laws of nature that goveren our world.The applied scientist adapts this knowledge to practical problems.Neither is more important than the other,however,for the two groups are very much related.
Sometimes,however,the applied scientist finds the "problems “for the theoretical scientist to work on.Let's take a particular problem of the aircraft industry:heat-resistant metals.Many of the metals and alloys which perform satisfactorily in a car cannot be used in a jet-propelled plane.New alloys must be used,because the jet engine operates at a much higher temperature than an automobile engine.The turbine wheel in a turbojet must withstand temperatures as high as 1,600 degrees Fahrenheit,so aircraft designers had to turn to the research metallurgist for the development of metals and alloys that would do the job in jet-propelled planes.
Dividing scientists into two groups-pure and applied-is only one broad way of classifying them,however.When scientific knowledge was very limited,there was no need for men to specialize.Today,with the great body of scientific knowledge,scientists specialize in many different fields.Within each field,there is even further subdivision.And,with finer and finer subdivisions,the various sciences have become more and more interrelated until no one branch is entirely independent of the others.Many new specialties-geophysics and biochemistry,for example-have resulted from combining the knowledge of two or more sciences.

当科学天际扩展了,二个主群科学家涌现了.一个是纯净的科学家; 其他,应用的科学家.纯净或理论科学家做原始的研究为了了解goveren我们的世界的基本的自然规律.应用的科学家适应这知识实用问题.都比其他,然而,二个小组的非常相关的不重要.有时,然而,应用的科学家发现" 问题“理论科学家的能工作.Let' s采取飞机制造业的一个特殊问题：抗热金属.在汽车令人满意地执行的许多金属和合金不可能用于一架喷气式推进飞机.因为喷气机引擎比汽车引擎,经营在高温必须使用新的合金.涡轮叶轮涡轮喷气必须承受温度高达1,600华氏度,因此航空器设计师必须转向将做在喷气式推进飞机的工作金属和合金的发展的研究冶金师.然而划分科学家成二小组纯净和只应用是一种宽广的方式分类他们.当科学是非常有限的,没有需要对于人专门研究.今天,与科学巨大身体,科学家专门研究许多不同的领域.在每个领域之内,有进一步细分.并且,与越来越美好的细分,各种各样的科学变得越来越相互关连,直到分支不完全地是其他的独立.许多新的专业地球物理和生物化学,为了例子起因于结合两个或多个科学知识.