今天，匹兹堡的报纸又开始印刷了。The newspaper presses are rolling in Pittsburgh again today.我每到匹兹堡，都给他打电话。When I'm in Pittsburgh, I call him up.匹兹堡的主要产品是钢材.The principal product of Pittsburgh is steel....
一群绿鹦鹉从杉木林里疾速飞出。A flight of green parrots shot out of the cedar forest.鸽子们低声咕咕地叫着，扑扇着翅膀飞进飞出。Pigeons fluttered in and out, cooing gently.烟囱里飞出无数火星。A shower of sparks flew up the chimney....