biological halflife

例句：

1. 1. The biological half-life of a drug is the time it takes for half of the drug to be eliminated from the body.
   药物的生物学半衰期是指药物在体内消失一半所需的时间。
2. 2. The study of biological half-lives is important for understanding how long certain substances remain in the body afterthey are taken.
   研究生物学半衰期对于理解某些物质在摄入后多久会在体内消失非常重要。
3. 3. The researcher found that the biological half-life of this compound was significantly longer than expected, which could have implications for its use in medicine.
   研究者发现这种化合物的生物学半衰期显著长于预期，这可能对其在医学上的应用产生影响。