逐步发展

The British present political system has evolved over several centuries.

英国现行政治制度是经过几个世纪逐步发展而成。

Urban disaster science is a new discipline having been uprisen with theindustrial development.

城市灾害学是随着工业化发展而逐步产生新学。

Etesian Qingdao interenational seawater desalination conference had broad influence and famousness,and it becomes a famous international conference brand step by step in China.

这青岛海水淡化国际会议在业内已有很大影响力和知名度，逐步发展成中国个知名国际会议品牌。