逐步发展

The British present political system has evolved over several centuries.

英国的现行政治制度是经过几个世纪逐步发展而成的。

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

城市灾害学是一门随着工业化发展而逐步产生的一门新学。

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

这一年一次的青岛海水淡化国际会在业内已有很大的影响力和知名度，逐步发展成中国的一个知名的国际会。