| 释义 |
half-life
基本英英搭配记法近义反义例句例句
n.半衰期
Noun:
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 disintegratehalf life time半衰期total half-life总半衰期effective half-life有效半排出期,有效半…radioactive half life放射半衰期,放射性物…biological half life生物学半排出期,生物…physical half life物理半衰期放射性物…half life半衰期(半衰变周期…biological half-life生物学半衰期,生物半…apparent half life表现半衰期biologic half-life生物(学半衰期…radioactive half-life半衰期half-life period半衰期antibody half-life抗体半衰期effective half life有效半排出期,有效半…apparent half-life表观半衰期
half-life⇒n.半衰期近义词 half life半衰期(半衰变周期…
名词100%
用作名词The time it takes for half of its original amount to decay is called thehalf-life.衰变至只剩下原来数目一半所需的时间称为该核素的半衰期。
It is not necessary to wait until half of a sample has decayed in order to measure the halflife.不必一直等到样品衰变一半之后才测量它的半衰期。 Cesium-137, however, can accumulate in muscles and is a bigger concern with a half-life of30 years; scientists plan to track it more carefully.
但是铯-137则可能在肌肉当中堆积起来，并且更使人担心的是它的放射性半衰期长达30年；因而科学家们计划更加小心的跟踪它的影响。 yeeyan
Don't drink anything with caffeine in it after dinner. Dependent on age, gender, and other physiological factors the half-life of caffeine in the body is roughly5-10 hours.
晚饭后，对咖啡因说不： 因年龄、性别和其它身体条件的不同，咖啡因在人体内的半衰期大致要5-10小时。 yeeyan |