a drainage system.其中drainage和system这俩词都是名词 为什么可以连在一起?名词前面不是形容词吗?何况这两个名词间无连字符 所以不能视为合成词呀!这样行不：a system of drainage?

a drainage system.其中drainage和system这俩词都是名词 为什么可以连在一起?名词前面不是形容词吗?何况这两个名词间无连字符 所以不能视为合成词呀!这样行不：a system of drainage? drainage Drainage the city was even equipped with a drainage system这句话里的with是什么用法 直接改成the city was even equipped a drainage system不可以吗? 此句句子成分分析,The city was even equipped with a drainage system,for a great many clay pipes were found beneath the narrow streets． 英语翻译The kinds of rocks on which the streams are developed,the structural pattern of the faults,and uplift will usually determine a drainage system. 新概念三中的一个语法小问题在新概念三中的《一个未知女神》里有一句话,The city was even equipped with a drainage system,for a great many clay pipes were found beneath the narrow streets.1,逗号在这里是什么作用? 介词宾语与状语的区别?介词宾语和状语的区别0 - 离问题结束还有 14 天 22 小时能举出列子分析下吗?这还有两个例子 the city was even equipped with a drainage system.The little girls were playing with snow with th build a strong immune system immune system 、、、 membrane drainage是什么意思啊 drainage structure是什么意思 英语翻译1.Floods disrupt normal drainage system in cities and typically overwhelm sewer systems.Thus,raw or partially raw sewage spills are common in flooded area.Additionally,（if the flood is severe enough）,destruction of building（ that ca a new system of elections 和 a radio broadcaating system System SYSTEM. system system. system