Clever designs playing with the sun and resulting shadow forms also use stark hunks of rough-hewn stone,taking us back to those pointers of old,or employ reflective materials like glass.
请问这句话中的 those pointers of old,是什么意思呢?
(Clever designs)taking us back to ....“这些巧妙的设计带我们回溯原来的指针”是这样理解吗?