英语释义

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

片语

radioactive isotope[核] 放射性同位素

isotope balance同位素平衡

isotope chart同位素图表

tracer isotope同位素指示剂；示蹤同位素

carbon isotope[核] 碳同位素

isotope geochemistry[地化] 同位素地球化学

isotope analysis[核] 同位素分析

isotope tracer同位素示蹤物

isotope enrichment同位素浓缩

isotope effect[核] 同位素效应

stable isotope[核] 稳定同位素

isotope chemistry[核] 同位素化学

isotope separation[核] 同位素分离

英汉例句

• in some circumstances, a feature caused by a rare isotope in the earth’s atmosphere might mimic the expected feature from normal methane on mars.

  在这样的情况下，地球大气层中稀有同位素所含的特征或许可以仿制常规火星甲烷所预计的特性。

• by measuring the levels of the isotope in fungus and ant bodies, the researchers could track whether nitrogen was coming from the soil or the air.

  通过测量真菌和蚂蚁体内同位素的含量，研究者们可以辨别出氮气是来自土壤还是空气。

• then the rods are removed, and dissolved in special solutions when uranium turns into residue and isotope of molybdenum-99 remains in the solution.

  然后铀棒被拆下，放入特殊溶液中，铀原料转变为残渣而钼-99同位素被留在了溶液中。

• astronomers talk of placing a radio telescope on the moon「s far side; energy experts want to mine the moon」s helium 3, an isotope that could power clean-fusion reactors back on earth.

  天文学家想在月球远端放置射电望远镜；能量学家想提取月球上的氦3这种可以驱动清洁融合反应器回到地球的同位素。

• it contains a tiny pellet of fuel made from an isotope of hydrogen called deuterium.

  其中放置了一个更微小的氘（氢的一种同位素）燃料丸。

• and the heavier oxygen from a natural process that left more of the light isotope in the part of the nebula that made the sun.

  重量较大的氧来自某种自然过程，在此过程中，大部分的轻同位素留在了形成太阳的部分星云中。

• therefore, von blanckenburg, and the gfz geoscientist, dr. hella wittmann, have analysed this 「cosmogenic」 isotope in the sand of the swiss alps rivers and, thus, in the direct products of erosion.

  因此，伯兰肯伯格和德国地球科学研究中心的海拉维特曼博士分析侵蚀的直接产物；瑞士阿尔卑斯山河流河沙中的宇宙辐射同位素。

• it also bodes ill for the prospect of fusion using helium-3, a rare helium isotope that is missing a neutron.

  这也预示着，利用氦-3这种缺少一个中子的稀有的氦同位素进行核聚变的前景很黯淡。

• although the easier ionization of radon leads one to expect the most extensive chemistry for that element, the high instability of even the most stable isotope has severely limited studies of it.

  氡容易离子化，这让人期望，该元素有最广泛的化学反应，但是，这个元素最稳定的同位素也极不稳定，这使氡的研究受到了严重的约束。

• however, there is a very attractive reaction between deuterium and a light isotope of helium known as helium-3.

  无论如何，在氘和一个氦的轻同位素也就是氦-3之间有一种吸引人的反应。

• 「this was an unexpected find, 」 says isotope geochemist and co-author christopher ballentine of the university of manchester in the united kingdom.

  「这是个意外的发现，」英国曼彻斯特大学同位素地球化学家、研究论文的合作者克里斯托弗·巴伦坦说。

• so if supersymmetry is true, there should be less of this isotope around than the standard model predicts.

  因此，如果对超对称性确信无疑，那么宇宙空间中元素同位素的存在就会比标準模式预测的要少。

• the city’s challenge, chiefly, is to dispose of cesium-137, a radioactive isotope with a half-life of 30 years.

  这座城市面临的最大问题就是处理铯—137，这是一种半衰期为30年的放射性同位素。

• isotope analysis of her hairrevealed that she spent the years before she died in america「s westernmountains, which helps detectives concentrate their search.

  对她的毛发同位素分析显示在她被杀之前她在美国西部的山区生活了数年，这将帮助缩小搜索范围。

• the researchers used what」s called an ion microscope to compare the amount of normal hydrogen in the moon rocks to the amount of the hydrogen isotope deuterium, which carries an extra neutron.

  研究人员利用所谓的离子显微镜来比较月球巖石中正常的氢元素含量及同位素氘的含量，元素氘比氢多带一个中子。

• this is the deut erium plant, an automated facility for extracting the heavy isotope of hydrogen from the local water supply.

  实际上这是个加工厂一个全自动化的设施 通过来从当地水源中提取氢气的重同位素来生产氘气。

• 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。

• the experiment involved irregular ion movement theory and isotope theory.

  这项实验涉及了不规则离子运动理论和同位素理论。

• the isotope ratios tell you about the bird’s diet. and that tells you where they dined.

  这些同位素的比例能够告诉我们这些鸟的饮食状况，也就提供了它们的地域信息。

• the krypton and xenon isotope ratios in the gas samples provided a surprising result: they did not match the ratios found in the primordial cloud that spawned the solar system.

  气体采样中的氪和氙同位素比值产生了一个令人吃惊的结果：这些比值跟在形成太阳系的原始云团中所发现的比值不一致。

• 「from isotope analysis, we were able to get a good idea of its feeding ecology, and it fits very well at the top of the feeding chain of marine mammals」 like polar bears today, she notes.

  「通过同位素的分析，我们已经能够大致掌握它的摄食生态了，而这也很符合位于食物链顶端的海洋哺乳动物的情况」就像现在的北极熊一样，她说。

• in this case the geologists drilled into the stalagmites and estimated their age from the way that uranium decays into an isotope of thorium.

  地质学家在石笋上鉆孔，使用铀衰变成钍的同位素的方法确定它们的年龄。

• when we count up the lithium atoms held in stars, there is only one-third as much of the lithium-7 isotope as there should be.

  当我们算出了在各个恒星中锂原子的总数，同位素锂-7的总量仅是在那里应有量的三分之一。