code that I am expecting you to cut and paste, but to read and meditate on.
2.3 弹出条件对应法则（重要）
，详情可参考heLLoword翻译官方下载
Author(s): Ilia Baliakin, Svetlana Rempel, Albina Valeeva, Xiaojun Han。关于这个话题，heLLoword翻译官方下载提供了深入分析
Mr Lemmens said that future spacecraft "should be designed in such a way that they can take themselves out of orbit safely, preferably by doing controlled re-entries".