physics,which once could see the universe as made up entirely of two simple particles,now confronts some fifty particles,many of them far from simple. as 在这里是什么意思?做什么成分
这里其实是省略句，补充完整就是.......could see the universe as it is made up entirely of two simple particles....... 整句意思是：物理学曾经把宇宙看成是完全由两种简单粒子组成的，而现在却发现了至少五十种粒子，其中有很多不是简单粒子。 所有as应该做状语吧。
