The Eucharist is a true sacrifice, not just a commemorative meal, as "Bible Christians" insist. The first Christians knew that it was a sacrifice and proclaimed this in their writings. They recognized the sacrificial character of Jesus’ instruction, "Do this in remembrance of me" (Touto poieite tan eman anamnasin; Luke 22:19, 1 Cor. 11:24–25) which is better translated "Offer this as my memorial offering."<quoted text>
No. You are wrong. Catholics believe Christ's sacrifice was once and for all. When Catholics attend Mass they are entering again into this ever present Sacrifice. It is the people who come and go into and out of this moment, not the people repeating the Sacrifice.
Hopefully you are imaginative enough to get the picture.
Thus, Protestant early Church historian J. N. D. Kelly writes that in the early Church "the Eucharist was regarded as the distinctively Christian sacrifice.... Malachi’s prediction (1:10–11) that the Lord would reject Jewish sacrifices and instead would have "a pure offering" made to him by the Gentiles in every place was seized upon by Christians as a prophecy of the Eucharist. TheDidache indeed actually applies the term thusia, or sacrifice, to the Eucharist....
"It was natural for early Christians to think of the Eucharist as a sacrifice. The fulfillment of prophecy demanded a solemn Christian offering, and the rite itself was wrapped in the sacrificial atmosphere with which our Lord invested the Last Supper. The words of institution,‘Do this’(touto poieite), must have been charged with sacrificial overtones for second-century ears; Justin at any rate understood them to mean,‘Offer this.’... The bread and wine, moreover, are offered ‘for a memorial (eis anamnasin) of the passion,’ a phrase which in view of his identification of them with the Lord’s body and blood implies much more than an act of purely spiritual recollection" (J. N. D. Kelly, Early Christian Doctrines [Full Reference], 196–7).
"Assemble on the Lord’s day, and break bread and offer the Eucharist; but first make confession of your faults, so that your sacrifice may be a pure one. Anyone who has a difference with his fellow is not to take part with you until he has been reconciled, so as to avoid any profanation of your sacrifice [Matt. 5:23–24]. For this is the offering of which the Lord has said,‘Everywhere and always bring me a sacrifice that is undefiled, for I am a great king, says the Lord, and my name is the wonder of nations’[Mal. 1:11, 14]" (Didache 14 [A.D. 70]).