英语听力：自然百科 地球力场 Earth's Force Field—11

 Blockson's computer model reveals that at the South Atlantic Anomaly, the magnetic field isn't just weaker than anywhere else on the planet. It's actually reversed polarity. 

 

 

 

There is a patch on the core in the South Atlantic where things are not pointing as they should be. They are opposite as the patch is growing. 

 

 

 

Where the magnetic field has reversed, lethal¹ cosmic radiation that has normally deflected² away from the Earth is getting through. The South Atlantic Anomaly stretches over 3 millions square miles,/ it extends over much of South America.

 

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Radiation currently reaches the upper atmosphere, so it mostly affects our spacecrafts and satellites, but if the anomaly continues to grow at the present rate, one day it will reach us. 

 

 

 

What's clear is there is a storm growing if you whale(捕鲸)under the South Atlantic. The storm is only just / beginning. If it grows, our vital protection against solar radiation will shrink. The sun will turn from being our friend to our enemy.

 

 

 

If our magnetosphere disappeared, high energy solar radiation would gradually strip our planet of its atmosphere, water and life. The stakes are high. To prepare for the future, we need to take a closer look at the past.

 

 

 

15 seconds, guidance is internal. 12, 11, 10, 9, ignition sequence start. 

 

 

 

July the 20th, 1969, Neill Armstrong is the first man to set foot on the moon. It's one of  / mankind's greatest achievements. The Eagle has landed. Roger, Tranquility, we copy you on the ground. 

 

 

 

But during the mission, Armstrong and copilot Buzz Aldrin see flashes of light inside the darkened Apollo 11 module³. Bizarrely, they even see the flashes with their eyes shut. When they return to Earth, they report what they saw, NASA scientists are mystified.

1 lethal   

adj.致死的；毁灭性的

参考例句：

• A hammer can be a lethal weapon.铁锤可以是致命的武器。
• She took a lethal amount of poison and died.她服了致命剂量的毒药死了。

2 deflected   

偏离的

参考例句：

• The ball deflected off Reid's body into the goal. 球打在里德身上反弹进球门。
• Most of its particles are deflected. 此物质的料子大多是偏斜的。

3 module   

n.组件，模块，模件；(航天器的)舱

参考例句：

• The centre module displays traffic guidance information.中央模块显示交通引导信息。
• Two large tanks in the service module held liquid oxygen.服务舱的两个大气瓶中装有液态氧。