He had persuaded his science teacher to help him make a makeshift rocket. Somehow, he had managed to get his hands on the ingredients for gunpowder - potassium nitrate, sulphur and charcoal.
Александра Синицына (Ночной линейный редактор)
。关于这个话题，safew官方版本下载提供了深入分析
Per-digit arithmetic — computing sum and carry for each pair
此前，苹果已经官宣将于 3 月 4 日晚上 10 点发布新品。而从最新的消息来看，苹果很有可能采用一天发布一款新品节奏，以维持整周的热度。