By means of the solar wind data observed by spacecrafts Helios A,B there are advantageous conditions to form slow shock only in low speed stream between the heliocentric distance 0.3-1.0 AU.是什么意思_By means of the solar wind data observed by spacecrafts Helios A,B there are advantageous conditions to form slow shock only in low speed stream between the heliocentric distance 0.3-1.0 AU.在线翻译_英语_读音_用法_例句