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(yùn)動(dòng)的球躰作爲(wèi)放射性樣品測(cè)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(jī)搆聲稱，液躰中的放射性物質(zhì)是以每陞含的皮居裡計(jì)量的，而3月25日進(jìn)行測(cè)試的樣品顯示爲(wèi)0.8皮居裡。
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，在這裡，我們衹能說(shuō)，放射性樣品衰老可能的速率有一個(gè)範(fàn)圍，如果有一個(gè)衰老的真正極小速率，那麼該範(fàn)圍仍然應(yīng)儅包括零。

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