单词half-life-period
网络: 半衰期；半衷期；半化期
The half-life period of this isotope is short, so it does no harm to man.
这种同位素半衰期短，对人无害。
Exogenous growth factors have a short half-life period, which are diluted and metabolized in vivo.
目的：外源性成骨生长因子半衰期短，在体内使用很快被稀释和代谢。
Experimental Study on Half-Life Period of Carotin in Spirulina
螺旋藻中胡萝卜素半衰期实验研究