In fact, clusters are the largest gravitationally bound bodies in the universe.The roadlike filaments may be larger in sheer size, but they are not coherent bodies held together by gravity.

• 事实上，星系团可说是宇宙中由重力束缚的最大系统，像道路般的网状结构区域可能比星系团还广大，但它们并不是由重力所贯串聚合起来的物体。