EPISODE · Mar 2, 2017 · 9 MIN
【阿门粤语课第121期】开天窗（）
from 粤语课程-零基础300日精通
【阿门粤语课零基础版第121期】 今日词语/句子：半衰期最早系物理学入面嘅概念，指嘅系放射性元素中半数原子核发生衰变所需要嘅时间，半衰期越短，衰变得越快；半衰期越长，衰变得越慢。唔同元素嘅半衰期差别非常大，短嘅唔到零点零一秒，长嘅可达几亿年。后嚟其他学科都沿用咗半衰期嘅概念，医学中，药物嘅半衰期系指药物系生物体内嘅浓度下降一半所需要嘅时间。元素嘅半衰期属于该元素嘅固有属性，唔受环境影响，而药物嘅半衰期就会因为个体体质唔同会有所差异。 今日俗语 ：开天窗（有两种含义）
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