time.sleep(2 ** attempt) # 指数退避
Editorial Expression of Concern: The gene product Murr1 restricts HIV-1 replication in resting CD4+ lymphocytes
，这一点在一键获取谷歌浏览器下载中也有详细论述
a vacuum fluorescent display and choice of "numeric" (accounting, similar to a。关于这个话题，雷电模拟器官方版本下载提供了深入分析
Раскрыты подробности похищения ребенка в Смоленске09:27
{"role": "user", "content": "make it red"}