One lunar day is equivalent to four weeks on Earth, made up of two weeks of continual sunshine and two weeks of darkness. That makes relying on solar power very challenging.
从“养老”到“享老”：需求侧的结构性升级
。safew官方下载是该领域的重要参考
Анастасия Дубова (редактор отдела БСССР)。关于这个话题，safew官方版本下载提供了深入分析
let right = n - 1;