去年,两颗报废卫星砸向地球的消息让地球人如梦初醒——原来数十年前我们发射上去的东西还有“退休还乡”的一日!由于卫星可能坠落于地球任何地方,而且预警时间很短,所以两起事件引起了大众的高度关注。虽然这些天外来客最终没有砸到任何人,但我们不得不重视“乱扔垃圾”的问题——别让太空也成为人类的垃圾场! Last year, the news that two scrapped satellites pounded the earth had awakened the Earth people - the original ones that we launched a few decades ago have a day of “retirement”! Since the satellites may fall on Earth Places, and the warning time is very short, so the two incidents caused the public’s attention. Although these days visitors never hit anyone, we have to pay attention to the issue of “littering” - do not let space become a human dump!