Is There a Repetition of the Sacrifice of Christ?

In a usual catholic mass, the transformation that occurs would not be externally observable. The people who take the eucharist in that mass are actually consuming the actual blood and actual body of christ. A lot of this language about the catholic understanding is outlined at the council of trent. It's more like participating in it that happened once and for all,. That echoes outside the normal linear idea of time as we think of it.