On the dawn side of the plasma sheet, the average of V_x and V_z are nearly equal to 0,but the average of V_y is in the order of -10 km/s.是什么意思_On the dawn side of the plasma sheet, the average of V_x and V_z are nearly equal to 0,but the average of V_y is in the order of -10 km/s.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句