Earth's atmosphere bends and filters sunlight as it passes around the edges of the world. The shorter blue wavelengths scatter, while red and orange light continue onward and reach the moon. The result resembles the warm glow of sunrise and sunset. In effect, light filtered through Earth's atmosphere tints the lunar surface.
However, this flexibility came at a cost for complex routes:，更多细节参见夫子
「軍委主席負責制」是中共軍隊最高領導制度，其核心內涵是確保最高軍事指揮權和決策權高度集中於軍委主席一人（目前即習近平），實現黨對軍隊的絕對領導。這一制度於2017年10月中共十九大正式寫入黨章，上升為中共黨內必須遵守的根本政治規矩。，这一点在safew官方版本下载中也有详细论述
Shortcut Pre-calculation: For the most commonly used speed profiles, the travel costs (time/distance) for shortcuts between border points within each cluster are pre-calculated and stored. (Each border point effectively has an "entry" and "exit" aspect for directed travel).