ionoscope

例句：

1. 1. The ionoscope was used to study the aurora borealis.
   离子管被用来研究北极光。
2. 2.The ionoscope was used as a diagnostic tool for detecting heart disease.
   离子管被用作诊断工具，用于检测心脏病。
3. 3. The ionoscope was used to transmit signals across great distances.
   离子管被用来在远距离传输信号。