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

• 面对飞机撞毁大楼、熊熊大火、巨楼倒塌等情景，我们无法相信眼前的惨状，感到无比的悲哀和愤怒。