管理员摘要：
4.It is reported that 据报道.....有报道称...... 5.It is estimated that 据估计..... 6..It is believed that 据信......大家相信.……
4.It is reported that 据报道.....有报道称......
5.It is estimated that 据估计.....
6..It is believed that 据信......大家相信.