The watercourse pollution of Suzhou has become an outstanding and urgent problem, which seriously affects its city image.
当前苏州河道水环境污染问题突出，严重危及城市形象。
The city of Yan'an, is located in the hilly loess plateau region, while the long and narrow watercourse makes lots of trouble in the process of city construction.
延安处于黄土高原梁峁地区，川道狭长的缺点，给不断扩大的城市建设带来了诸多不利。
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