范艾伦探测器

美航局发射的两个范艾伦探测器重复在空中作环状飞行时发现了第三个辐射带。

By looping through them repeatedly , the twin Van Allen Probes discovered a third band of radiation .

范艾伦辐号探测器发现，除去已知的两层结构，该地带还偶有第三层带电粒子存在。而它们有时会形成所谓“斑马条纹”的区域。

The Van Allen Probes discovered that , instead of two layers , the belt has an occasional third layer of charged particles and that they sometimes form zones called ' zebra stripes . "

范艾伦辐号探测器发现，除去已知的两层结构，该地带还偶有第三层带电粒子存在。而它们有时会形成所谓斑马条纹的区域。

The Van Allen Probes discovered that , instead of two layers , the belt has an occasional third layer of charged particles and that they sometimes form zones called ' zebra stripes ' .

为了更好地了解宇宙气象，美国航空航天局于2012年发射了一对名为范艾伦号的探测器。探测器由应用科学实验室所研制，用以探索这片神秘区域。

To learn more about space weather , NASA in 2012 launched a pair of satellites built by Applied Physics Laboratory . Called Van Allen Probes , they were to explore the mysterious belt .