查询词典 sealed radioactive source

Have produced the natural radioactive level of the colliery of Yunnan through the investigation: Mainly it is brown coal , it is low bituminous coals rotten, in bituminous coal and levels radioactives natural of bituminous coals rottens highs rotten.

通过调查得出了云南煤矿的天然放射性水平：主要是褐煤、低变质烟煤、中变质烟煤和高变质烟煤的天然放射性水平。

Radioactive materials in gaseous and liquid effluents produced during normal reactor operations including expected operational occur- rances.

一在正常运转及可预见事故下，气体及液体放射性物质之释放量。

This is because radioactive nuclear elements are formed in the giant outbursts of energy, and some of these decay by releasing positrons.

这是因为放射性核素在这巨大的爆炸能量中形成，其中一些放射出正电子而衰变。

Meanwhile, positrons from the decay of a form of radioactive sodium are separately slowed and accumulated.

同时，来自放射性钠一种形式的衰减正电子被慢慢分开且累积起来。

The protocol is summarized in Figure 18.16. A radioactive probe representing a gene (most often a labeled cDNA clone derived from the mRNA) is hybridized with thedenatured DNA of the polytene chromosomes in situ. Autoradiography identifies the position or positions of the corresponding genes by the superimposition of grains at a particular band or bands.

如图26.15所示为此过程草图：一个放射性探针代表一个基因（常是一个从mRNA中克隆得到的cDNA），它与原位多线染色体的变性DNA杂交，放射自显影仪可通过叠印特定纹带的纹理来识别应答基因的位置。

The protocol is summarized in Figure 18.16. A radioactive probe representing a gene (most often a labeled cDNA clone derived from the mRNA) is hybridized withthe denatured DNA of the polytene chromosomes in situ. Autoradiography identifies the position or positions of the corresponding genes by the superimposition of grains at a particular band or bands.

如图26.15所示为此过程草图：一个放射性探针代表一个基因（常是一个从mRNA中克隆得到的cDNA），它与原位多线染色体的变性DNA杂交，放射自显影仪可通过叠印特定纹带的纹理来识别应答基因的位置。

The migration of radioactive nuclides in groundwater is the one of most important problems in environmental geosc...

放射性核素在地下水中迁移的研究是当前环境地球科学的一个热点课题。

The migration of radioactive nuclides in groundwater is the one of most important problems in environmental geosciences at present.

放射性核素在地下水中迁移的研究是当前环境地球科学的一个热点课题。

In our country,the monitoring to radioactive intension is implementing,but to nuclides,it is weak relatively.

我国目前实施对放射性强度的监测，而对核素监测相对比较薄弱。

As a result of nucleus test and nucleus electricity station building in developed countries,the pollution of radioactive nuclides to environment has been concerned in the world.

由于发达国家的核试验和核电站的建设，放射性核素对环境的污染已引起世界各国的关注。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。