翻译一段中译英文章此外,城市策划者也充分利用了自然的地理特征,特别是一些自然池塘.在北面的皇家宫殿和湖边还有西面的南北计

In addition,the city planners also made full use of geographical conditions especially some natural ponds.To the N of the imperial palaces and lakes and by the W side of the N-S planning axis,there was a larger lake called Water Storing Pond which connected with the tail of Grand North-South Canal,from which ships and boats carrying grain and other goods from S China sailed into Dadu and anchored in this lake.As a result,a big commercial district along the pond wharfs and near the Drum and Bell Towers emerged.This area was called Towers Bazar.It is the very commercial center of first generation in Beijing.Besides,two secondary bazars in Dadu were located at crossroads besides the E and W royal city gates respectively.Even though the trade network of Dadu was quite simple,we can still get the central place structure of commercial activities in a capital of China's feudal empire.