飘落到我国的微量放射性尘埃远不足以对人体构成损伤。
The radioactive dusts falling to our country is far from enough to cause damage to human health.
这些微量放射性物质达到了检出水平，我们当然能够检出极低含量的放射性。
They're trace levels but of course with radioactivity we can measure very low amounts.
这些矿物可以用放射性衰变技术测定年代，因为它们所含的放射性微量元素非常少。
These minerals can be dated by radioactive decay techniques because of the very small quantities of radioactive trace elements they, in turn, contain.
总共有485块锆石内部带有包体，其中有十几块包体中含有放射性微量元素，研究者可以根据它们来测定包体的年代。
A total of 485 zircons held inclusions, and about a dozen or so of these contained radioactive trace elements that allowed the researchers to determine their ages.
枝野幸男说，有“微量”的放射性物质随着蒸汽被排放至大气中。
“Tiny amounts” of radioactive material had escaped into the air during the ventilations, Mr Edano said.
志愿者饮用了微量的放射性元素标记的药物——剂量小到没有伤害，只有足量的百分之一。
Volunteers are given tiny traces of a radioactively labelled drug-too small to harm them, and typically just one-hundredth of the estimated full dose-in a drink.
黑龙江省东北部空气中检测出极微量的放射性物质。
Extremely low levels of radioactive material have been detected from the air in the northeast of Heilongjiang Province.
锘在锕类元素中的一种放射性超铀元素，人工微量制造，其最长寿命的同位素是锘255，其。
A radioactive transuranic element in the actinide series, artificially produced in trace amounts. Its longest-lived isotope is No255 with a half-life of3 minutes. Atomic number102.
锘在锕类元素中的一种放射性超铀元素，人工微量制造，其最长寿命的同位素是锘255，其。
A radioactive transuranic element in the actinide series, artificially produced in trace amounts. Its longest-lived isotope is No255 with a half-life of3 minutes. Atomic number102.
应用推荐