放射性

Other radioactive elements have been discovered since: actinium, radiothorium and mesothorium, ionium , etc.

自那以后发现的其他放射性元素有：锄、放射性钍和新针、镍，等等。

We have established the perfect metrological standard equipment and calibrating method, we have had the ability to provide the metrological assurance for the environmental radioactivity air survey.

在核设施退役过程中，通过航测全面掌握拟退役核设施及周围地区的放射性辐射现状，为核设施退役的放射性治理在范围和程度上提供了科学有效的数据，可以有效地支持核设施的安全退役。

Its isotopes, all radioactive, are highly toxic radiological poisons because they give off alpha particle s and are specifically absorbed by bone marrow.

它的所有同位素都是放射性的，因其放出的α粒子易于被骨髓吸收而具有高度的放射性毒性。尽管具有潜在的致命性，它的毒性通常是被夸大了的。

The content of radioactive elements in sediment is related to the scale of sediment granularity and lithology, being high in argillaceous sediments e.

同时，放射性元素含量的高低还与古气候环境有关，温暖潮湿的环境放射性元素含量较高，凉爽干燥的环境含量较低。

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。

In the International System of Units, the unit of radioactivity becquerel Harrell, called becquerels, symbol Bq, 1Bq equal to 1 second of radionuclides in the nucleus occurred within a decay, that decay 1Bq = 1 times / sec .

在国际单位制中，放射性活度的单位为贝可勒尔，简称贝可，符号为Bq，1Bq等于放射性核素在1秒钟内有1个原子核发生衰变，即1Bq=1次衰变/秒。

At 24 and 48 h after ［3H］tricyclopinate, both total and binding radioactivity were still seen in caudate putamen.

24和48 h，总放射性和结合放射性在脑的尾壳核仍有弱的影像显示。

Chalcolite ( crystallized phosphate of copper and uranium) is about twice as radioactive as uranium.

铜铀云母的放射性是铀放射性的两倍。

The prediction of the concentration of radioactive nuclides is the basis and premise of emergency action and radioprotection.

放射性核素浓度的确定是放射性事故抢险救援和辐射防护等工作的基础和前提，是放射性事故应急救援的重要组成部分。

The contents of U and Th in water samples from the Irtysh River and wastewater from a rare multi-metal mine have been detected directly by ICP-MS.

运用简易、快捷、灵敏的ICP MS法直接测定稀有多金属矿以及河水样品中的铀钍含量，并推算其与比放射性活度之间的定量关系，客观评价了某稀有多金属矿废水中的放射性水平以及额尔齐斯河流域的放射性污染现状。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。