When the british took over the fort , they wisely moved into the existing buildings and continued to use the sewerage system designed by the dutch .
英国人占领古堡后,明智地搬进了现成的建筑,继续使用荷兰人设计的污水处理系统。
Zimbabwe declared a state of emergency today as a cholera epidemic , caused by the collapse of sewerage and water supply systems , spread throughout the country .