The breakdown of radioactive isotopes goes on at constant rates . 放射性同位素的衰變在恒定的速率下進(jìn)行。
There are two main types of uses of radioactive isotopes in biochemistry . 在生物化學(xué)中,放射性同位素主要有兩方面的應(yīng)用。
The large number of radioactive isotopes among the heavy elements fit into three series . 重元素中的大量放射性同位素分屬于三個系列。
The inferno spewed a deadly plume of radioactive isotopes into the atmosphere . 這個象煉獄般的地方將一縷致死的放射性同位素噴入大氣層。
A radioactive isotope of carbon , especially carbon14 放射性碳碳的一種放射性同位素,尤指碳14
The meteorite , which recently fell to the tropical island in pacific ocean , proved to be the present well of the thinnest radioactive isotope 最近落到在太平洋的熱帶島隕石證明是最薄的放射性的同位素的現(xiàn)在井
Autoradiography a technique whereby a tin slice of tissue containing a radioactive isotope is placed in contact with a photographic plate 放射自顯影術(shù):將含有放射性同位素的一小薄片生物組織與感光層接觸的一項技術(shù)。
The importation of the radioactive isotope , radiation equipment and other radioactive materials should come up to applicable state regulations 進(jìn)口放射性同位素、射線裝置和含有放射性物質(zhì)的物品的,按照國家有關(guān)規(guī)定辦理。
We can talk about the half - life of a radioactive isotope , and indeed we can measure and state very very precisely what that half - life is 我們可以談?wù)摲派湫酝凰氐陌胨テ冢覀兇_實可以非常準(zhǔn)確地測量和描述半衰期是什么。
Gamma rays have proved very helpful in medicine and industry . these rays are also given off by radioactive isotopes obtained as by - products in production processes 射線已被證實在醫(yī)學(xué)和工業(yè)上有很大的用處,這些射線是在生產(chǎn)過程中由放射性同伴素釋放出的副產(chǎn)品。