查询词典 radioactive

Radioactive series: Any of four sets of unstable heavy atomic nuclei that undergo a series of alpha decay and beta decay until a stable nucleus is achieved.

放射性系：四组不稳定的重原子核，通过一系列α衰变和β衰变直至达到稳定的核为止。

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。

Some nuclei, especially heavier ones, are unstable , or radioactive, emitting energy in the form of alpha rays, beta rays, or gamma rays.

有些原子核并不稳定，特别是较重的核，或称具有放射性，以α射线、β射线或γ射线的形式发出能量。

Some nuclei, especially heavier ones, are unstable, or radioactive, emit ting energy in the form of alpha rays, beta rays, or gamma rays.

有些原子核并不稳定，特别是较重的核，或称具有放射性，以α射线、β射线或γ射线的形式发出能量。

A radioactive transuranic element; discovered by bombarding americium with helium.

一种放射性超铀元素，在用氦轰击镅时发现。注意，注意力集中

Consequently, a fossil which an archeologist finds to be billions of years old by radioactive dating may in fact be no more than several thousand years old.

因此，化石中的一个考古学家认为这是一个数十亿岁的放射性测年，而事实上也可能没有超过几千岁。

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。

Based on the natural gamma log curve s of acid tuff and clay rocks of acid volcanic events,the author here queries the arguments that radioactive intensity of sedimentary strata will grow with the increasing argillaceous materials and that the natural gamma value and the empirical equation can be used to calculate contents of argillaceous materials.

根据酸性凝灰岩和酸性火山事件粘土岩的自然伽马测井曲线，对当前流传的"沉积岩层的放射性强度随泥质含量的增加而增高"的概念和用自然伽马值及经验公式求泥质含量提出质凝。

For better understanding of thermo-hydro-mechanical coupling processes of argillite rock in Mont Tern project site during the long-time radioactive waste disposal, coupled fields of temperature pore pressure and stress are studied during the heating and cooling phases with the theory of porous media mechanics.

为了解黏土岩在放射性废料长期贮存中的热－水－力耦合过程，结合Mont Terri核废料贮存地下岩石试验工程中黏土岩各种物理量的各向异性特点，应用多孔介质力学耦合理论研究了该黏土岩在加热和冷却全过程中由于热荷载引起的耦合效应场。

According to principles of software engineering, radioactive sources calculation and the working process of RMS simulation are realized under the real time simulation support system, ASCA.

在实时仿真支撑系统ASCA下，按照软件工程学的原则，实现对放射源的仿真计算和对辐射监测系统工作过程的模拟。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。