虽然这种云在高层大气中几乎不构成任何威胁,但是它在地面散发出的放射粒子的余波应该是任何监管机构所关注的。
Although such a cloud would pose virtually no threat while in the upper atmosphere, the fallout at the ground of radioactive particles from it should be a concern for any monitoring authority.
火球和蘑菇云将放射性粒子推到上空,然后风将它们吹送到附近及远处。
The fireball and mushroom cloud carry radioactive particles upward, and the wind sends them near and far.
第二,核电站还是处于不稳定的状态,存在着突然释放大量放射性粒子的风险。
Two, the plant is still unstable, at risk of suddenly emitting vastly greater amounts of radioactive particles.
Alpha particles are these helium nuclei, and they are the result of radioactive decay.
阿尔法粒子是氦核,它们是放射性衰变的产物。
For those of you don't know what that is it's simply an instrument that counts radioactive particles in the air, and MIT now that you're at MIT, you'll all have a chance to see one first hand if you're ever in any of the labs, especially in the chemistry or bio labs.
不知道它是什么,它就是一个简单的,计算在空气中放射粒子数目的仪器,你们现在来了,如果你们在实验室里工作的话,尤其是化学和生物实验室,你们有很多机会亲手用到它。
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