Radionuclide with long half-life causes radioactive contamination and produces a series impact on the ecosystem, threatens human health and survival of other bio-organisms.
放射元素半衰期长,放射性污染物进入土壤会危害农业生态环境,威胁人类的健康和其他生物的生存。
Sparfloxacin is a new fluroqui nolones which has a long half-life time, perfect tissue penetration, broad spectrum.
司帕沙星是一种消除半衰期长,组织渗透力强,抗菌谱广的新型喹诺酮类抗菌药物。
The decay rate of the C-14 sample with its long half-life should be nearly constant during the short duration of the experiment.
在一个短实验周期里,具有较长半衰期的C14样品的衰变速率应该是一个近似常数。