查询词典 sealed radioactive source

In the high energy physics laboratory called CERN, just outside Geneva in Switzerland, unstable muons (a type of fundamental particle that normally undergoes radioactive disintegration after about one millionth of a second) have been found to live longer by factor of thirty when travelling at high speed around a circular machine shaped like a large hollow doughnut.

在一个叫做 CERN 的高能量物理实验室，这个实验室在瑞士的日内瓦郊外，不稳定的μ介子（一种基本粒子，在百万分之一秒内会进行放射性衰变。）在绕着一个外形像中空的炸面圈形状的圆形机器中高速运行时，它的存在时间已经可以延长30倍了。

The messenger of the electromagnetic force is the photon with zero mass; the weak force that accounts for radioactive disintegration and causes the sun and the stars to shine is carried by the heavy W and Z boson particles; while the strong force is carried by gluon particles, which see to it that the atom nuclei hold together.

电磁力的信使是零质量的光子，弱作用力可以用来说明辐射衰变和太阳和恒星发光，其信使是重W和Z玻色子。

Our bodies can also be subject to radioactive fall-out in the event of nuclear weapon tests, or incidents such as the 1986 disaster at the Chernobyl nuclear power plant in the Soviet Union.

我们的机构也可以受到放射性下降out 在事件进行核武器试验，或事件，例如1986年的灾难，在切尔诺贝利核电厂在苏联。

Radioactive fall-out dust carried by winds around the earth after a nuclear explosion,etc

当时，进行核武器交锋的唯一可以想到的结果就是相互毁灭：美苏之间你炸掉我一个城市，我也炸掉你一个城市。

A radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction.

使化合物中化学反应的机制显踪的放射性同位素。

The result shows that radioactive isotope tracer petroleum logging technique possesses favorable application prospect both in theory and in production.

实验结果表明，放射性同位素示踪能谱测井技术在理论上和生产中具有良好的应用前景。

KCJJY The application of radioactive isotope in biomedical research is an important part of the peaceful use of atomic energy.

KCJJ 放射性同位素在生物医学研究中的应用是国家和平利用原子能的重要标志之一，有不少用途是其它技术无法取代的。

All its isotope s are radioactive.

镭的所有同位素都是放射性的。

The radioactive isotope iodine-131, with an eight-day half-life, is very useful in medicine and other applications

放射性同位素碘－131的半衰期为8天，在医学和其它应用中都很有用。

A radioactive isotope of iodine widely used as a tracer in medical diagnosis .

放射性碘碘的一种放射性同位素，广泛地用于医学诊断作为追踪剂

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。