原文：North and South Adelaide are divided by the Torrens River, sp

原文：North and South Adelaide are divided by the Torrens River, spanned by four bridges and lined with ornamental gardens.
译文：南北阿德莱德两区被托伦斯河区分开来，河上有桥梁四座，两岸点缀着许多花园。
【正确答案】：改译：阿德莱德南北两区以托伦斯河为界，河上有桥梁四座，两岸点缀着许多花园。
【题目解析】：be divided by意为“被...分开”，在这里可以翻译为“以...为界”。