...a masterpiece of 18th-century town planning...是什么意思？

...a masterpiece of 18th-century town planning...

18世纪城镇规划的杰作

masterpiece

n. 杰作，名作，杰出的事；

例句
The whole thing was a masterpiece of crowd management.
整件事情就是人群管理的典范。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

town

n. 城镇，市镇，小村庄，城镇居民，商业中心；

例句
Altogether, it was a delightful town garden, peaceful and secluded.
总体上说，这是个令人愉快的城市花园，宁静而偏僻。

planning

n. 计划，规划；v. “plan”的现在分词，计划，设计；

例句
There was evidence that thirteen people in all had taken part in planning the murder.
有证据表明共计13人参与策划了这起谋杀。