地球外部包裹着一个巨大的磁气圈,它是由地球磁场和一些带电气体构成的。过去,科学家以为这个大泡泡是地球自己制造的,最近他们才发现,有相当一部分带电气体来自伺机钻进地球保护圈的太阳风。 The earth is surrounded by a huge magnetosphere, which consists of the Earth’s magnetic field and some charged gases. In the past, scientists thought that this big bubble was made by the Earth itself. It was only recently that they discovered that a considerable part of the charged gas came from the solar wind that waited to drill into the Earth’s protective ring.