radioactive

• It had been used for practical ends, to identify elements and to unravel radioactive decay chains .
  已将其用于实践的目的，去鉴别元素和阐明放射性衰变系。
• Since radioactive iodine decays rapidly, virtually all radiation ceases within a few weeks .
  由于放射性碘能迅速破坏，因而实际上几星期内放射性就全部结束了。
• The storage of radioactive waste in the subsurface is a possible solution of their ultimate disposal .
  放射性废料的地下贮存是彻底处理它们的一种可行解决办法。
• The radioactive cloud reaches a height of several miles before spreading out abruptly into a mushroom shape .
  放射性云在上升达几英里高度后才猛然散开成蘑菇状。
• In its early stages the rain was augmented by the small water droplets still descending from the radioactive cloud .
  开始时，从放射性云下沉的小水滴使雨势增大。
• Tritium is radioactive and is believed to be the main source of the major traces of 3he found in the atmosphere .
  氚是放射性的，并且确信是大气中痕量3He的主要来源。
• A radioactive particle moving in a blood stream causes transient changes of dose rate near its path .
  当一个放射性物质在血流中移动时在它的路径附近引起剂量率的瞬间变化。
• Each radioactive nucleus of a particular kind is responsive to a fixed decay probability per unit time .
  每个特定类型的放射性原子弹对单位时间内一个固定的衰变几率作出响应。
• Radioactive and other hazardous materials present health and safety problems in increasing numbers of countries .
  放射性及其它有害物质将给越来越多的国家带来健康和安全问题。
• In this experiment, a soil sample was incubated with a dilute soup of radioactive organic molecules .
  在这个实验中，一份土壤样品同一份含放射性有机分子的稀释浓稠液体一起培养。