評論
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The solar system is a hostile place. Earth is under attack from deadly cosmic radiation. Life here is only possible because it is protected by the magnetosphere, an invisible force field that cocoons the planet. But new evidence reveals that this vital shield is weakening. A region above the south Atlantic is experiencing dangerous levels of radiation. It's earth loosing its magnetic shield.
太陽系是一個充滿敵意地方。地球正遭受致命的宇宙射線。能在這里生活是因為受到磁體一種無形的力量的保護(hù)。但是新的證據(jù)表明這一至關(guān)重要的防護(hù)罩正在減弱。南大西洋地區(qū)正遭受著危險水平的輻射。地球正在損失這個磁場防護(hù)罩。
It's not a matter of if the earth's magnetic field will disappear some day, it's a matter of when.
問題不在于地球的磁場將會在哪天消失，這只是一個時間的問題。
And what will happen to life if it does?
如果消失，地球?qū)鞘裁礃幼幽兀?/div>
Like a giant umbrella, earth's magnetosphere shields us from the steady stream of cosmic radiation that fills our solar system. Exposure to this is deadly.
像一個巨大的傘一樣,地球磁場防護(hù)罩保護(hù)我們免于遭受充滿我們的太陽系中絡(luò)繹不絕的宇宙射線。暴露無疑是致命的。
The magnetic field coming out from earth makes a big bubble around the earth, the magnetosphere that protects us from the most violent actions of the sun.
磁場圍繞地球產(chǎn)生了一層很大的保護(hù)罩,它讓我們不暴露于太陽的危險照射下。
Many of the charge particles in the solar wind have enough energy so that they would represent a hazard to human beings if they made direct contact with the surface environment.
許多電荷的太陽風(fēng)粒子在有足夠的能量, 如果它們直接接觸地面環(huán)境,就能構(gòu)成對人類的危害。
If you are on the path that this oncoming charge particles zipping out from the sun, if you are not inside, some shielded, you are dead.
如果你受到來自太陽的這些粒子的直接照射,如果不是防護(hù)罩里面有些屏蔽的話,你已經(jīng)死了。
Without the magnetosphere, all life is vulnerable to these high energy cosmic particles. They penetrate living tissue and cause severe damage to cells.
沒有這些保護(hù),所有生命在這些高能宇宙粒子面前都是異常是脆弱。他們穿透活體組織對細(xì)胞造成嚴(yán)重的傷害。
As the field becomes weaker and weaker, the effects of the space radiation will be felt at lower and lower and progressively lower altitudes. So possibly one outcome of a reduced magnetic shield would be, through increased exposure radiation, higher rates of cancer among populations.
保護(hù)罩變得越來越弱,空間輻射的影響將在低海拔逐步被感受到。所以可能的結(jié)果之一是,暴露在輻射之下,致癌發(fā)病率將會明顯增加。
