翻译:建造节能型房屋不仅需要建造材料,同时也需要脑力.
take是指"花费",如it take me five hours to get there 我花了5个小时才到那儿
more than不只,不仅仅
第一个it是代词,指代后面的to construct...houses这个短语的,所以这句话也可以这么写:
To construct these energy-saving houses took more than building supplies.It took brains,too
用it来代替是因为避免主语太长(头重脚轻)