From Washington, this is VOA News. 这里是美国之音,由华盛顿发来报道. Deadly suicide bombing hits Nigerian school--close to 50 killed.... 尼日利亚校园发生的一起致命性汽车自杀袭击案件造成近50人死亡 President Obama promises U-S commitment to Asia.... 奥巴马总统允诺美国将恪守对亚洲的承诺... I'm Ray Kouguell reporting from Washington. 这里是雷.柯格尔,华盛顿为您报道. At least 48 people have been killed in a suicide bombing at a school in northeastern Nigeria, many of them students. The blast occurred Monday in the town of Potiskum, in the state of Yobe, as students gathered for a morning assembly at a government-run secondary school focused on science. 尼日利亚东北部学校发生的自杀性炸弹袭击事件造成至少48人死亡,其中大部分是学生.爆炸于周一发生在约贝州的波蒂斯库姆镇,当时这所理工科公立中学的学生正集合开早会. ____________________