放射性样品选择得很巧妙，假使一个小时之后，衰减的可能性为五十比五十。
The sample is chosen so that after, say, one hour, there stands a fifty-fifty chance of a decay occurring.
给出了一种用室内快速运动的球体作为放射性样品测量室内氡射气辐射活度的新方法。
A new method of measuring indoor radioactivity of radon is presented by using the indoor fast-moving ball as the sample of a radioactive substance.
所以，在这里，我们只能说，放射性样品衰老可能的速率有一个范围，如果有一个衰老的真正极小速率，那么该范围仍然应当包括零。
So here, we can only say that there is a range of possible rates of senescence of the radioactive sample, and if there is a really tiny rate of senescence, that range would still include zero.
其中一个样品中还检测到了放射性的铯-137，但是还在法律限定标准之下。
Radioactive caesium-137 also appeared in one of the samples, but at levels below the legal limit.
摆放在长谷川桌子上的大部分检测样品，都被证明所含的放射性元素铯- 134，铯- 137和碘- 131均在可安全范围内。
Most of the samples that have passed across Hasegawa's desk have proved to be within the legal consumption limit of the radioactive isotopes cesium 134 and 137 and iodine 131.
由于进行多金属结核与结壳研究测量样品的量较少，其中的放射性核素含量很低，所以要用低水平放射测量方法完成分析测量工作。
The measuring method of low level radioactivity were used because the sample is often very less and the radioactivity is frequently very low.
由于可以将纯净放射性核束注入到样品中去，使得其在固态物理特别是涉及到半导体中的杂质和缺陷问题的应用成为可能。
Since pure radioactive ion beam can be implanted into material directly, research on solid physics especially on impurity and defect in semiconductor become possible.
以比较的方法，介绍了ISO CS系统无源刻度测量方法相对于传统环境样品放射性测量方法的优点。
This paper introduces the advantages of ISOCS measurement method by efficiency calibration without a radioactive source, comparing with traditional measurement methods of environment samples.
矿石样品放射性镭含量比岩石样品高19倍，为井下氡气的主要来源；
The content of radioactive radium in mineral was 19 times higer than that in rock and served as a chief source of radon.
测定了在该泉水中养殖的鱼类及用该泉水灌溉生长的农作物和其他有关环境生物样品中天然放射性物质的含量。
The natural radioactive substance content was determined for fishes, in thermal spring water, farm products irrigated with such water and other biological samples.
携带式同位素放射性X—射线荧光分析，是一种非破坏性(对样品)的仪器分析方法。
The portable type of isotopic radiogenic X-ray fluorescence analysis is a kind of method of instrumental analysis without the destructive effect on the samples.
结果：不同产地、不同品种的进口花岗岩石材样品中天然放射性核素的比活度与普通建筑材料比有较大差别。
The specific activities of natural radionuclides in import granites of different producing area and different varieties have biggish differences with those in normal building materials.
每船货物需经瑞士通用公证行进行认证，并让其出据样品检验如重量、化学成分、货物形状且货物无放射性的书面证明。
SGS will inspect a representative sample of iron ore for each shipment and will issue a written certificate of weight, chemical contents, physical size and no radioactivity;
报道了咸阳市常用装饰石材及彩釉砖样品中天然放射性核素含量的调查分析结果，并据国家建筑材料放射性核素含量最新标准进行分类分析。
A report is made on the inspection results of the content of natural radionuclides of decorative stone and glazed tiles commonly used in Xianyang.
报道了咸阳市常用装饰石材及彩釉砖样品中天然放射性核素含量的调查分析结果，并据国家建筑材料放射性核素含量最新标准进行分类分析。
A report is made on the inspection results of the content of natural radionuclides of decorative stone and glazed tiles commonly used in Xianyang.
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