放射性

• The radioactive dust will contribute to higher levels of uranium and radon .
  放射性尘埃会形成铀和氡的高值。
• The leaf was allowed to photosynthesize in the presence of radiocarbon .
  叶子被允许同放射性碳进行光合作用。
• Researchers use radiocarbon to study certain biological processes .
  研究人员借助放射性碳来研究某些生物过程。
• The amounts of radio-activity disseminated are subject to careful control .
  放射性排放量是要经过严格控制的。
• This example illustrates the great sensitivity of the radioactivity method .
  这个例子说明了放射性方法很灵敏。
• The residual nucleus will, in general, undergo a radioactive transformation .
  剩余核一般说来将发生一次放射性衰变。
• Radioactivity is the ejection of particles or radiation from the nucleus .
  放射性是原子从核中射出粒子或辐射的现象。
• During those hours radioactive xenon gas built up in the reactor .
  在这几个小时中，放射性气体氙在反应堆中聚集增多。
• Pitchblende and chalcolite are much more radioactive than uranium itself .
  沥清铀矿和铜铀云母比纯铀的放射性强得多。
• Consequently, radiometric dating has advanced briskly in the past 30 years .
  因此，新近三十年来，放射性计时迅猛发展。