The pictures of airplanes flying into buildings,fires burning,huge structures collapsing,have filled us with disbelief,terrible sadness and a quiet,unyielding anger.

• 飞机撞击大楼，出现滚滚浓烟，巨大的建筑物轰然坍塌。这情景令我们难以置信，使我们的心中充满了极度的悲痛和难言而又无法妥协的愤怒。