查询词典 sealed radioactive source

A series from actinium to lawrencium of 15 radioactive ''.

15个从锕到铹的原子量递增的放射性元素。

A series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium.

15个从锕到铹的原子量递增的放射性元素。

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。

A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead.

一种存在周期短的放射性金属元素，由铀形成，能分裂成锕然后分裂成铅。

All are radioactive heavy metals; and only the first four (actinium, thorium, protactinium, and uranium) occur in nature in appreciable quantities. The other 11 are unstable and are produced only artificially.

这些元素都是具有放射性的重金属；仅前四个元素是在自然界中存在的，其余十一个都不稳定且均为人造的。

Microarray technology requires the testing or probing procedure to be "reported" by a fluorescent, radioactive or color readout, which can be analyzed by scanners with a resolution equivalent to each addressable point on the array surface.

微点阵技术需要一个荧光、辐射或彩色读出的测试步骤，具有一定分辨率的扫描仪对点阵表面的每一个有址可寻的点进行分析。

It's just radioactive enough for us to track the air moving through your lungs.

其放射性足以使我们能够追踪在你肺部的空气运动

The results show that the allanite is partly-metamict, which was caused by the radioactive decay of Th, U existing in the lattice of allanite.

从而探讨其结构特性，形成条件，岩体演化与稀土元素演化的关系。

Atomic number Z = 25, atomic weight of 54938, the chemical symbol Mn, only the F there is a stable isotope, radioactive short-lived, there are three kinds of allotrope α,β,γ.

原子序数Z＝25，原子量54938，化学符号为Mn，只F有一种稳定同位素，放射性的寿命很短，有三种同素异形体α、β、γ。

The radiation of alpha particles during radioactive decay.

在放射性衰变的历程中放出α粒子的辐射。

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。