W hen the Earth moves from perihelion to aphelion, its radiationbelts are expansion, and aphelion to perihelion contraction.
当地球从远日点运动到近日点时，地球辐射带向内收缩。
2
Eventually, the accelerated electrons become trapped in the Earth's radiationbelts, where they can interfere with satellite communications and navigation.
最后，这些被加速的电子束陷入地球的辐射带之内，可以对卫星通讯和导航系统产生干扰。
3
Scientists designed a path that takes Juno around Jupiter's poles, spending as little time as possible in the sizzling radiationbelts around Jupiter's equator.