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近来我们从报纸和杂志上经常读到苏联把原子能利用于和平建设的文章。大家都知道原子能的应用是非常广泛的,它在医学方面的应用,在苏联已有很多新的成就。究竟原子能怎样应用于医学呢?要了解这个问题,首先要搞清楚什么是同位素?什么是放射性同位素?所谓“示踪原子”或“标记原子”又是什么意思?我们都知道,物质是由各种元素构成的。元素的最小单位是原子,但并不是原子就不能再分了,实际上原子是由原子核和它外围的電子(?)所组成的。原子
Recently we have often read from the newspapers and magazines that the Soviet Union used atomic energy for peaceful construction. We all know that the application of atomic energy is very extensive. Its application in medicine has many new achievements in the Soviet Union. How can atomic energy be used in medicine? To understand this problem, we must first understand what is isotope and what is a radioactive isotope. What does “tracer atom” or “marker atom” mean? As we all know, Material is composed of various elements. The smallest unit of an element is an atom, but it can not be subdivided if it is not an atom. In fact, an atom consists of the nucleus and the electrons (?) Outside it. atom