逐步发展

The British present political system has evolved over several centuries.

英国的现行政治制是经过几个世发展而成的。

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议在业内已有很大的影响力和知名，发展成中国的一个知名的国际会议品牌。