self.session = requests.Session()
The R-sequence is another type of low-discrepancy sequence based on specially chosen irrational numbers[10]. It is similar to interleaved gradient noise but is simpler to compute and possibly more effective as a dither, particularly when augmented with a triangle wave function as demonstrated:
Before you share your location, you'll get to choose how long you want to share -- one hour, today only (ending at midnight), until you turn it off, or for a custom time period less than 24 hours. You can also stop sharing at any time.，这一点在搜狗输入法下载中也有详细论述
第二十四条 已抵扣进项税额的购进货物（不含固定资产）、服务，发生增值税法第二十二条第三项至第五项规定情形的，应当将对应的进项税额从当期进项税额中扣减；无法确定对应的进项税额的，按照当期实际成本计算应扣减的进项税额。，这一点在51吃瓜中也有详细论述
Avoiding false alarms has been one goal for Nick Rutter at FireAngel。关于这个话题，旺商聊官方下载提供了深入分析
Photograph: Simon Hill