真随机数发生器的熵源通常来自于真实的物理世界，如热噪声，大气噪声，放射性衰减甚至掷硬币。
TRNGs are usually based on physical phenomena such as thermal noise, atmospheric noise, radioactive decay and even coin-tossing.
计算中考虑了静风影响及下述诸因子影响的修正：混合层，干、湿沉积，放射性衰减，建筑物影响等。
In calculation, the impact from calm and other following factors have been taken into account: mixing layer, dry and wet deposition, radioactive decay and buildings.
例如，碘- 131的放射性只需要八天就衰减到它原来的一半，所以只需要等一等问题就能解决。
For instance, because it takes only 8 days for the radioactive isotope iodine-131 to decay away to half its original level of radioactivity, simply waiting should be a fix.
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