if r.status_code in (429, 503):
Read the full story at The Verge.，这一点在快连下载安装中也有详细论述
const posToTime = new Map(); // 位置 → 到达终点的时间（避免重复计算），详情可参考旺商聊官方下载
Those with growth-based views, Carroll argues, still want something special, but expect rough patches. "They ask… what can they do to make their relationship better, have improvement and have growth?"