"几十栋楼房"用英语可以说作 "several dozen buildings" 或 "dozens of buildings"。
"Several" 是英语中的一个形容词，意思是"几个"，"dozen" 是英语中的名词，意思是"一打"。所以 "several dozen" 就是 "几打"的意思。
"Building" 是英语中的名词，意思是 "建筑物"。
例句：
The city has several dozen buildings that are taller than 100 meters. (这个城市有几十栋高于100米的建筑物。)
Dozens of buildings were damaged in the earthquake. (地震中有几十栋建筑物受损。)
因为这是英语中常用的表达方式，所以语言表达来源于英语本身。