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

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.

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.

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.

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.

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.

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.

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.

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 )

the discovery of radioactivity

放射现象的发现

I took the cigarette he offered, drawing at it raggedly.

我接过他给的烟, 在上面胡乱地画起来.

A stone wall trails raggedly through the woods.

一条破烂的石墙穿过树林.

However, rationalism advocated in this era is more preference and emphasis on tools, purpose ration.

然而, 这个时代所提倡的理性主义更多地偏爱和侧重于工具 —— 目的理性.

But in treating the western values and rationalism, they are significantly different.

但是在对待西方价值观和理性主义的态度上, 两者差异显著.

Arthur Schopenhauer a pessimistic philosopher a rebellion against rationalism, stressing the importance of will and intuition.

德国哲学家亚瑟.叔本华的悲观主义与反理性哲学强调了人的意愿与直觉的重要性.

The Renaissance and the Church Reform laid a foundation for the rationalism of the modern age.

文艺复兴和宗教改革,奠定了近代唯理论的基础.

Especially the comment on rationalism of this part is essential for better understanding of irrationalism.

尤其是对理性主义的论述和评析,为剖析当代非理性主义作了充分的铺垫.

...the scientific rationalism of the West.

西方的科学理性主义

Socialist practices throughout the whole 20 th century were stamped with rationalism.

摘要20世纪的社会主义实践深受理性主义的影响,甚至可以说!

News reports should embody rationalism and demonstrate human concern.

摘要构建和谐传媒,需要营造和谐的新闻传播生态.

The perceptualism happiness, rationalism and moralism happiness has functioned under different ages, regions and cultural backgrounds.

感性主义幸福观 、 理性主义幸福观、德性主义幸福观都曾在不同时代 、 不同地域和文化背景下发挥过作用.