A female suicide bomber has attacked a market in the northern Nigerian city of Maiduguri. The security forces said that at least seven people were killed, including the bomber. Nearly 30 others were wounded. _______________________ 一名女性在尼日利亚北部城市迈杜古里一个市场实施自杀式炸弹袭击.安全部队称袭击造成包括袭击者在内的7人死亡.将近30人受伤. _______________________