Remember that any protection, however temporary, is better than none at all, and the more shielding, distance, and time you can take advantage of, the better.
记住，任何的保护措施，不管是否是临时性的，总要比没有任何的防护要好，遮挡放射性尘降物的东西越多，离放射性尘降物的距离越远，越善用时间，保护的效果就会越好。
Remember the three protective factors: Distance, shielding, and time.
要记住躲避核辐射的三因素：距离，掩体，时间。
We wish to estimate at what distance this shielding becomes incomplete.
我们想要估计一下，在多大距离处这种屏蔽作用将变为不完全的。
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