查询词典 radioactive element

In particular, Qianlong Xianmao shows good resistant effects to some radioactive material and infectious diseases, is creditably considered as 'top quality healthy liquor'.

尤其是该酒对放射性物质和传染病具有良好的抵御作用，不愧是高品质，不伤身，和健康的好酒。

In 1895 she married Pierre Curie, and then they worked together on the research into radioactive matter.

她在1895年皮埃尔居里结婚，然后他们一起工作的研究，放射性物质。

"For the invention and development of the cyclotron and for results obtained with it, especially with regard to artificial radioactive elements"

"对回旋加速器的发明和发展，并以此获得有关人工放射性元素的研究成果"

The clinical curative effect , assessment and classification of radioactive lung damnification, negative effects and life quality were observed.

以肿瘤客观疗效、放射性肺损伤的评定及分级、毒副反应情况、生活质量状况为指标进行临床疗效观察。

The decay of ~(99m)Tc source was used to verify experimentally that in the measurement of the number of atoms of a radioactive isotope in a sample at time t_0, the error introduced through the inaccuracy of its decay constant can be reduced to a much smaller value by the careful selection of the time of measurement or measurements of its radioactivity at around one life time (1/λ) after t_0 and doing the calculation.

本文用~(99m)Tc源的衰变实验证明了：在测量一个样品中在t_0时的一种放射性同位素的原子数时只需精心选择一次或多次测量其放射性的时刻在t_0后约该同位素的一个寿期(1/λ)，并进行计算，则由它的衰变常数或其半衰期(T1/2)的不准确性而引进的误差可以被降低到较小值。

The core of this model is a function called a stretched exponential relaxation, which is similar to the decay curve of a radioactive material.

这个模型的核心是延伸型指数函数的松弛效应，就像放射性物质的衰变曲线一样。

It is major work to present the tectonic time duration system of the strain rate method, which is an original exploration.(1) Principle: Its basis is the stress and strain rule depending on strain capacity in steady-state stress field, but not the radioactive decay law depending on radiation dose in invariable radiation field. This can be simplified as a process of differential stress-strain rate-strain capacity-time duration calculating.

工作重点是梳理出应变速率法构造时限定年系统，属原创性探索：①原理：不是基于放射性核素衰变规律，而是基于应力应变规律；不取决于恒定辐射场的辐射剂量，而取决于稳态应变场的应变量，可简括为差异应力-应变速率-应变值量-计算时限的求索过程。

It is the product of radioactive decay and is used in helium dating.

氦是由放射性衰变形成的，可用于氦年代测定法。

Radium does not occur free in nature but occurs in natural ores such as pitchblende as a disintegration product of radioactive decay of heavier elements, including uranium.

在自然界镭不存在游离状态，但存在于天然矿石中，如沥青铀矿，是更重元素放射性衰变的产物。

Radium does not occur free in nature but occurs in natural ore s such as pitchblende as a disintegration product of radioactive decay of heavier elements, including uranium.

在自然界镭不存在游离状态，但存在于天然矿石中，如沥青铀矿，是更重元素放射性衰变的产物。

Don't listen to their haver, nothing of that sort.

别听他们胡说八道，根本就没那回事。

But bank's shares trade below their book value, suggesting that investors are skeptical.

但是，银行股票以低于账面价值的价格交易，这一点反应了投资者的怀疑。