isotope

英 ['aɪsətəʊp] 美['aɪsə'top]

英英释义考试真题实用场景例句

n. 同位素

TEM8GRE低频词扩展词汇

中文词源

isotope 同位素

iso-,等，同，-top,位置，地方，词源同topic,utopia.即等位置的，引申词义同位素。

词态变化

复数: isotopes;

英文词源

isotope: isotope: [20] The term isotope for a version of an element with a particular atomic weight was coined in 1913 by the British chemist Frederick Soddy. It means literally ‘equal place’ and was formed from two Greek components, the prefix iso- ‘equal’ and the noun tópos ‘place’ (source of English topic). The reason for the coinage was that although isotopes of the same element have different atomic weights, they occupy the ‘same place’ in the periodic table of elements.
=> topic
isotope (n.): 1913, literally "having the same place," introduced by British chemist Frederick Soddy (1877-1956) on suggestion of Margaret Todd, from Greek isos "equal" (see iso-) + topos "place" (see topos); so called because despite the different atomic weights, the various forms of an element occupy the same place on the periodic table.

双语例句

1. Lasers promise to change this by making isotope separation easier, and cheaper.: 激光可以改变这种局面,从而使同位素分离变得比较容易、比较廉价一些.

2. This indium isotope was created at the same time as the earth.: 这种铟同位素与地球产生在同一时代.

3. The isotope ratio is directly used for comparing oils or gases.: 同位素比率直接用于比较各种石油或天然气.

4. Changes of nuclear mass and nuclear size cause isotope shifts.: 原子核质量和大小的不同引起同位素移动.

5. There are several ways to separate excited from unexcited molecules, thus harvesting the desired isotope.: 目前有几种方法可以把受激发分子同未受激发分子分离开, 这样,就可以大量得到我们所需要的同位素了.

英英释意

1. one of two or more atoms with the same atomic number but with different numbers of neutrons

实用场景例句

radioactive isotopes: 放射性同位素

the many isotopes of carbon: 碳的诸多同位素

...tritium, a radioactive isotope of hydrogen.: 氢的放射性同位素氚

The CO 2 has a type of 4� � ( PDB ) of the carbon isotope composition.: 这种成因CO2具有典型-4‰ ( PDB ) 的碳同位素组成特征.

Isotope tracing technology was used on animal experiment since 1920 s.: 同位素示踪技术是20世纪20年代开始用于动物试验.

This indium isotope was created at the same time as the earth.: 这种铟同位素与地球产生在同一时代.

Under 0.1 ~10 isotope ratio range and 95 % confidence, the relative expanded uncertainty of the technique %.: 最后得出在铀同位素丰度比为0.1～10的范围内95%的置信水平下, 该方法的相对扩展不确定度为0.10%.

The isotope ratio is directly used for comparing oils or gases.: 同位素比率直接用于比较各种石油或天然气.

The image obtained on development shows the distribution of the isotope in the tissue.: 这项技术可以显示出组织中同位素的分布情况.

Cryogenic distillation is an effective method for hydrogen isotope separation required in fusion fuel ( cycles ).: 低温精馏分离氢同位素的技术,是可使聚变反应器燃料循环使用的有效方法.

Isotope thickness measurement instrument is composed of radial sources, detector and control instrument.: 同位素测厚仪由放射源、探测器、控制仪表三部分组成.

Simmons : Get me a sample and some isotope readings.: 弄些样本和同位素读数.

After calibrated by Uranium isotope ratio reference materials, the accuracy and precision are improved.: 使用铀同位素标准物质校正质谱计,方法测量铀同位素丰度比的准确度和精密度明显提高.

The isotope does occur in nature but only extremely rarely.: 钋的同位素在自然界中的确存在,但是相当罕见.

This text summarized the advancement of the use of isotope analysis of herbicide remainder.: 本文综述了利用同位素示踪技术对除草剂的残留分析进展.

The most abundant isotope of hydrogen, H 1, with atomic mass 1.: '氘'.''''.'氢'.''的数量最丰富的一种同位素, h1, 原子质量为1.

Each element has at least one isotope with unstable nuclei that can undergo radioactive decay.: 每个元素至少有一个同位素不稳定原子核可以进行放射性衰变.

Solving the static characteristic roots of hydraulics in isotope separation centrifuge cascades is an important problem.: 求解离心级联水力学静态特征根是同位素离心分离领域的一个重要研究课题.

There are several ways to separate excited from unexcited molecules, thus harvesting the desired isotope.: 目前有几种方法可以把受激发分子同未受激发分子分离开, 这样,就可以大量得到我们所需要的同位素了.

More than two tons of this plutonium isotope were generated within the Oklo deposit.: 在欧克陆矿床中,有超过两公吨的钸同位素形成.

An isotope log of water injection profile is affected by many factors, specially the string contamination.: 同位素注水剖面测井受多种因素, 特别是管柱沾污的影响,使得测井资料质量差或根本无法解释.

Its most common form, or isotope, has 146 neutrons.: 它最常见的形式或者同位素有146个中子.

To determine the content of Chloramphenicol ( CAP ) in honey using stable isotope dilution technique.: 建立稳定同位素稀释技术测定蜂蜜中氯霉素 ( CAP ) 分析方法.

Nuclear Chemistry: radioactive chemicals, radiation chemistry, radiation chemistry, isotope chemistry, nuclear chemistry.: 核化学: 放射性化学品, 辐射化学, 辐射化学, 同位素化学, 核化学.

The Mujiazhuang copper deposit with high radioactive lead isotope area of the South Qinling Orogenic Belt.: 铅同位素结果研究表明,穆家庄铜矿矿石铅和近矿围岩岩石铅具有富含放射性成因铅的特点.

Today, most cyclotrons are used either for instructional purpose or for isotope production.: 今天大多数回旋加速器是用在教学上,或者用于同位素生产.

In order to differentiate between isotope, a new system of symbol writing had to be developed.: 为了区分同位素, 不得不制定新的符号书写体系.

The oldest aeolian deposit on terrace T 2 is loess L 1, corresponding to oxygen isotope time MIS 2.: T2阶地上覆的最老风尘沉积是黄土L1, 对应氧同位素期MIS2.

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