half life

1. Objective: To determine the numerical value of light dense of sodium salicylate by colorimetric analysis, and calculate its plasma half life.
   目的：用比色法测定水杨酸钠的光密度值，并计算血浆半衰期。
2. This half life of technical skills is without parallel in any other industry.
   技能的日新月异是其它任何行业都无法相提并论的。
3. Intraperitoneal chemotherapy is reported to be advantageous as the chemo drugs are more effective given this route and have a longer half life.
   腹腔内化疗据报道，有利于作为化疗药物更有效地给予，这条路线，并有较长的半衰期。
4. Most macro lenses can produce an image which is half life size on the film.
   多数微距镜头可以产生实物一半大小的影像。
5. Based on the questions in clinics and pertinent literature, the antibacterial action, half life and adverse reaction of azithromycin and erythromycin were discussed in this paper, and the dosages per day for continuous administration and intermittent administration of azithromycin were calculated.
   根据临床中遇到的问题，结合相关文献，应用阿奇霉素半衰期计算其在连续用药和间隔用药中每日体内药量，讨论阿奇霉素和红霉素在临床应用中的抗菌作用、半衰期及不良反应。
6. The Sun is near half life expectancy.
   太阳快到其生命的一半了。
7. Old masons thinking along while, he thought he worked hard, more than half life soon have burn up.
   老石匠思索了半天，他想到自己辛苦操劳了多半辈子，生命很快就有燃尽了。
8. It is the author's self-description of his half life's academic achievements.
   本文为作者半生学术经历的自述。
9. Radioactive substances will speed up their dissipation to such a degree that what had hundreds of years of half life will simply cease to exist.
   放射性物质将加速其解体，使得还有好几百年（射性）半衰期物质完全停止存在。
10. Now, if the husk is damaged, it will start off with less than half life, but since most of the time it will have not been injured, it is generally accepted that it will start with half of its maximum health.
    现在，如果外壳被损害了，它的起始血量会比半血少，但是由于大多情况下，它不会被伤害，所以大致可以认为它们的起始血量是最大血量的一半。
11. Now, we also can usefully look at the half life, in this case, in the case of first order kinetics.
    现在我们看看，这个一阶反应的半衰期。
12. On half life and plateau concentration of nonlinear elimination drugs
    关于非线性消除药物半衰期和坪浓度的研究
13. Recovery half life and degrees of gas exchange variables? were? calculated.
    连续测量运动及其恢复期气体交换参数，并计算气体交换参数恢复半衰期和恢复程度。
14. The expressions are given. The half life times of atmosphere on Earth and Venus for different temperature distributions are calculated from the formula.
    根据数学表达式，假定不同的大气温度，计算了地球和金星大气层的半寿命。
15. In the present work, the half life of ￣( 79) Se has been measured using radioChemical method.
    本工作应用放化法测量了￣（79）Se的半衰期。
16. To study the half life period of carotin in spirulina and its forecast methods.
    [目的]探讨螺旋藻主要成分胡萝卜素的半衰期与预测方法。
17. CONCLUSION: The elimination half life of NGF in mice was short.
    结论：NGF在体内消除半衰期较短。
18. A method for burning of actinides and fission products with long half life
    一种烧毁锕系元素和长寿命裂变产物的方法
19. The half life time was about 12 hours for both the active and passive smokers;
    主、被动吸烟者的代谢半衰期均约为12小时；
20. Objective To explore the half life and retention of Imipenem in the third space.
    目的探讨严重烧伤后抗生素在第三间隙水肿液中的半衰期和潴留状况。
21. Cytokines have short half life, and only promote the wound healing by about 10%.
    细胞因子疗法存在半衰期短的问题，促愈速率仅增加10%左右；
22. Objective: To study stability of stable chlorine dioxide, and predict its half life and term of validity.
    目的：研究稳定态二氧化氯的稳定性能，并预测其半衰期及有效期。
23. The half life period of modified SOD is 14 h and the effective survival time is 43 d.
    修饰SOD的半衰期为14h，有效保存期为43d。
24. Clarithromycin is a kind of new 14-membered ring macrolides antibiotic with long half life in tissue.
    克拉霉素是新型14圆环大环内酯类抗菌素，其组织半衰期长，能在周围组织形成较高的药物浓度。

noun

1. the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)

   Synonym:    half-life