放射性的

Usually 1896 Becquerel discovered natural radioactivity as the beginning of nuclear physics, the next 40 years, it is mainly engaged in the nature of radioactive decay and radiation research.

通常把1896年贝克勒耳发现天然放射性做为核物理的开端，此后的40多年，人们主要从事放射性衰变和射线性质的研究。

Any of several radioactive gases that are isotope s of radon and are products of radioactive decay.

"几种氡的同位素的放射性气体，是放射性物质衰变的产物。"

When the distribution of important fission products is calculated, emphasis is placed on the noble gas radionuclides and upon radioisotope of iodine because of their great contribution to accident dose.

在对重要裂变产物分布的仿真计算中，重点放在了惰性气体核素和碘的放射性同位素上，因为它们是事故中放射性剂量的重要来源。

Because of the administration and equipment, the radiation accident in which radioactive nuclide and rays do harm to the public or the workers directly or indirectly occurs sometimes.

由于管理或设备的原因，核技术应用中放射性核素、射线直接或间接对工作人员或公众的健康、安全造成危害的放射性事故时有发生。

Any of several radioactive gases that are isotopes of radon and are products of radioactive decay.

"几种氡的同位素的放射性气体，是放射性物质衰变的产物。"

Tp the time required for one-half of the atoms in a group of radioactive atoms to decay.

放射性药物radiopharmaceuticals是指药物的本身含有放射性核素，用于人体疾病的诊断与治疗的特殊药物。

Discharging radioactive waste liquid not by the prescribed means, or discharging radioactive waste liquid by using soakaway, seepage pit, natural crevice, karst cave or by other means prohibited by the State

不按照规定的方式排放放射性废液，利用渗井、渗坑、天然裂隙、溶洞或者国家禁止的其他方式排放放射性废液的

Radioactivity such as that of strontium 90 causes health problems in people even at low levels.

像银－90的放射性，哪怕是较低水平的放射性，都会对人体的健康造成危害。

It summarizer the environmental monitoring activities carride out byin the USSR and some other countries after the accident .

本文介绍了苏联切尔诺贝利核电站事故的放射性核素释放和地面沉降特点，简述了事故后苏联和其他国家的环境监测活动并讨论了γ能谱技术在环境放射性监测中的重要性。

In my study, the incidence of acute radiation tracheitis was 53.8% in CRT group, all of them were Ⅰor Ⅱgrade, it was obvious that conformal radiation technique was better and reduced the incidence of it.

本研究中，适形治疗组放射性气管炎的发生率为53.8%，且全部为Ⅰ、Ⅱ级，明显轻于其他两组，可见，适形治疗技术可以明显的降低急性放射性气管炎的发生。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。