radioactivity

Radioactivity : Property exhibited by certain types of matter of emitting radiation spontaneously.

放射性: 某些类的物质自发发射辐射的特性.

To produce ( radioactivity, for example ) artificially by bombardment of a substance with neutrons, gamma rays, and other particles.

感生通过用中子流 、 r射线线和其它一些粒子流射向一个物质而产生 ( 例如,放射现象 )

They argued that only a negligible rise in atmosphere radioactivity resulted from the test.

他们辩解说,由这次试验所造成的大气层放射活动的增加是微不足道的.

The level of radioactivity in the soil was found to be above recommended limits.

土壤的辐射水平被发现超过规定的限度.

People had no idea of radioactivity before Curie discovered radium.

直到居里夫人发现镭后,人们才了解放射性.

METHODS: Using tissue culture and radioactivity analysis methods.

方法: 采用组织培养及放射免疫分析方法测定各指标.

Nevertheless, radioactivity remained a property exclusively associated with some thirty substances existing naturally.

然而, 放射性一直是大约三十种天然物质特有的性质.

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.

Overburden had concealed the radioactivity.

覆盖层屏蔽掉了放射性.

The dismantling of a nuclear reprocessing plant caused a leak of radioactivity yesterday.

昨天拆除核后处理工厂引起了放射物泄漏.

The radioactivity was being swept upwards by the air current and out into the atmosphere.

放射能被气流吹起,进入大气层.

As a special treatment modality, radionuclide therapy is characterized by radioactivity throughout the treatment procedure.

放射性核素治疗是一种特殊的治疗技术, 其整个治疗过程都具有放射性.

Conclusion It was succeed keys to treat and nurse of esophagitis of radioactivity.

结论放射性食管炎的治疗和护理,是放疗成败的关键.

the discovery of radioactivity

放射现象的发现

high levels of radioactivity

高强度的辐射

The site was found to be contaminated by radioactivity.

发现此地受放射线污染.

It analyzes data processing method of radioactivity abnormity application effect of reservoir searching with radioactivity method.

总结了油气藏上方放射性异常的规律.

The government has been storing radioactive waste at Fernald for 50 years.

政府在弗纳德存放放射性废料已达50年之久。

Electricity and radioactivity have little in common and do not resonate.

电流与放射性之间几乎没有任何共性,也无法共振.

In practice it would be possible to measure radioactivity one thousand fold less than this.

在实际上,可能测定的放射性比这个值小一千倍.

It is the product of radioactive decay ( see radioactivity ) and is used in helium dating.

氦 是由放射性衰变形成的,可用于氦年代测定法.

The Geiger counter showed the existence of radioactivity.

盖格计算机显示出放射性的存在.

The ability of radiation to induce radioactivity in food is related to its energy.

辐照所引起的使食物具有放射性的能力是与辐照的能量有关的.

Measuring technology of nuclear energy spectrum is the foundation of matter composition and radioactivity nuclear methods.

核能谱测量是进行物质成分分析和放射性检测的重要方法之一.

The atomic bomb is characterized by the grave injuries caused by radioactivity.

原子弹具有由辐射引起严重损伤的特点.

This, because of its age, has already lost most of its radioactivity.

这些铅因为年代久远, 已失去了它绝大部分的放射性.

A metal called uranium gave off a kind of radiation, which Marie Curie later called radioactivity.

一种叫铀的金属发出一种射线，后来玛丽·居里把这种现象称为放射性。

The soil contains 30 times the acceptable level of radioactivity.

这片土壤受到了高于标准30倍的辐射.

This example illustrates the great sensitivity of the radioactivity method.

这个例子说明了放射性方法很灵敏.

The material is free from radioactivity, nontoxic and harmless.

该材料不含任何放射性元素, 无毒、无害、无放射性.