______________Witnesses say at least 3,000 Ethiopian troops have entered Somalia, reportedly for an attack on al-Shabab militants. Residents of the Gedo region said they saw troops with tanks and armored vehicles crossing the border Monday. This is VOA news. ______________目击者称,至少3000名埃塞俄比亚士兵进入索马里,据报道他们是为了袭击青年党激进分子.格德地区的居民称,周一他们目睹了军队驾驶坦克和装甲车进入边境地区.这里是美国之音新闻.