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- isotopic scintiphoto 同位素闪烁(照)片
- Isotopic discrimination is not likely. 同位素甄别是不可能的。
- Isotopic geochronology and geochemistry II. 同位素地质年代学与地球化学2。
- Measurement of geologic time,as through isotopic radioactive decay. 地质年代测定是通过放射性同位素衰变来测定的。
- From 3.5 to 0 ka B.P. ,lake water was in an isotopic steady stage. 5~0ka B.;P;湖水处于同位素稳定阶段。
- An isotopic analysis of the grains has made that fear come true. 一项对这些颗粒的同位素分析让这种担心成真了。
- How could such a change in isotopic composition have come about? 同位素的组成有这样的变化，究竟是如何发生的？
- The isotopic signatures of most ancient limestones indicated the same process. 大多数古代石灰岩的同位素特征说明了同样的过程。
- Measurement of geologic time, as through isotopic radioactive decay. 地质年代测定通过放射性同位素衰变来测定地质年代
- Being a noble gas, it resists chemical bonding with other elements and is thus easy to purify for isotopic analysis. 由于氙是惰性的，不易与其他元素产生化学键，因此很容易纯化以进行同位素分析。
- It is important to avoid the use of uranium compounds of unspecified isotopic composition. 要避免使用那种非专用的同位素成份的铀化合物。
- The progeny of vocahic spurting inJinningian is studied through isotopic era, which belonys to the morning of new proterozoic era. 经同位素年龄研究属晋宁期火山喷发产物，时代归属为新元古代早期。
- The time required for half the nuclei in a sample of a specific isotopic species to undergo radioactive decay. 半衰期放射性样品的原子核经历一半放射性衰变所需要的时间
- Isotopic studies from geothermal fields indicate that about 95% of the thermal fluid from steam wells is meteoric in origin. 地热田油同位素研究证明：蒸气井热流体的95%25左右是大气降水成因的。
- Another mystery is the isotopic composition of xenon found in minerals from the Oklo uranium deposit in Gabon, Africa. 另一个令人费解的问题就是在非洲加蓬的奥克洛铀矿床的矿物中所发现的氙同位素组成。
- On-Line measurement of solid content in aluminium hydroxide slurry by isotopic densitometer. 应用同位素密度计在线测量氢氧化铝料浆的固体含量。
- Evidence from isotopic dating suggests that the greenstone belts vary considerably in age. 来自同位素年龄鉴定的证据指出，绿岩带在年龄上彼此变化相当大。
- Isotopic geochemistry of granitic rocks from Tuomuer Peak region, Tianshan, China. 天山托木尔峰花岗质岩石的同位素地球化学特征。
- Precise determination of the platinum-group elements and Os isotopic ratios in low-level rock samples. 岩石样品中低含量铂族元素和锇同位素比值的高精度测量方法。
