核反应堆完全熔解后，会释放出另一种危险物质铯- 137。铯- 137的半衰期为30年。
Cesium-137, with a half-life of 30 years, is another dangerous substance emitted in a full-scale nuclear meltdown.
氚聚集在核反应堆的冷却水中，通常以微量排放到环境中，其半衰期为12年。
It accumulates in the cooling water of nuclear reactors and is often vented in small amounts to the environment. Its half-life is 12 years.
半衰期实际上是,一半反应物消失的时间。
So, the half-life is just the time that it takes for half of the reactants to disappear.
现在我们看看，这个一阶反应的半衰期。
Now, we also can usefully look at the half life, in this case, in the case of first order kinetics.
一个很有用的量是反应的半衰期。
一个很有用的量是反应的半衰期。
应用推荐