radioactive sample

基本解釋

A new method of measuring indoor radioactivity of radon is presented by using the indoor fast-moving ball as the sample of a radioactive substance.
給出了一種用室內(nèi)快速運動的球體作為放射性樣品測量室內(nèi)氡射氣輻射活度的新方法。
Radioactive materials in liquids are measured in pico-curies per liter, and the sample, taken March 25, showed a reading of 0.8 pico-curies, the agency said.
該機構聲稱，液體中的放射性物質(zhì)是以每升含的皮居里計量的，而3月25日進行測試的樣品顯示為0.8皮居里。
So here, we can only say that there is a range of possible rates of senescence of the radioactive sample, and if there is a really tiny rate of senescence, that range would still include zero.
所以，在這里，我們只能說，放射性樣品衰老可能的速率有一個范圍，如果有一個衰老的真正極小速率，那么該范圍仍然應當包括零。

On the strength of Erector's success, Gilbert branched out into microscopes, chemistry sets and a nuclear science kit containing a small sample of radioactive material.
FORBES: Life
On the strength of Erector's success, Gilbert branched out into microscopes, chemistry sets and a nuclear science kit, which contained a small sample of radioactive material.
FORBES: Global Life
Its half-life—the time taken for half the radioactive atoms in a sample to decay—is 109 minutes, compared with two minutes for oxygen-15, ten minutes for nitrogen-13 and 20 minutes for carbon-11.
ECONOMIST: Case history: The power of positrons