例句與造句

1. In point of fact many many many states of our world that had been seemingly fictional turned out upon actual movement in some forward direction through time to be, lo and behold, actual facts that had been in our forward lightcone or some aggregation of our possible or potential forward lightcones.
2. The other, more radically innovative, approach initiated by Penrose was to overlook the detailed geometrical structure of spacetime and instead concentrate attention just on the topology of the space, or at most its conformal structure, since it is the latter  as determined by the lay of the lightcones  that determines the trajectories of lightlike geodesics, and hence their causal relationships.
3. It's difficult to find lightcones in a sentence. 用lightcones造句挺難的