读音:gū chéng
繁体字:孤城
英语:A city whose surroundings all have fallen into enemy hands and is isolated and without help.
读音:niǎo bèi
繁体字:鳥背
意思:(鸟背,鸟背)指高处。 ▶宋·曾巩《送程公辟使江西》诗:“龙渊决水涨清沼,鸟背诛林开广厦。” ▶宋·曾巩《汉广亭》诗:“云根辨毫芒,鸟背临嵂崒。”