The full teaching:
The sacrifice of Christ and the sacrifice of the Eucharist are one single sacrifice: "The victim is one and the same: the same now offers through the ministry of priests, who then offered himself on the cross; only the manner of offering is different." "In this divine sacrifice which is celebrated in the Mass, the same Christ who offered himself once in a bloody manner on the altar of the cross is contained and is offered in an unbloody manner." (CCC, n. 1367)The same sacrifice. It is only made present in an unbloody manner. The Mass is a sacrament, i.e. an outward sign of an inward and invisible grace (St. Augustine). Thus in the Mass there is the unbloody outward sign which makes present the inward grace of the bloody sacrifice of Jesus on the Cross. Without this fundamental understanding of the sacraments you cannot understand Catholic teaching.
IF it's the same sacrifice, there would be blood present.
"The victim is one and the same: the same now offers through the ministry of priests, who then offered himself on the cross; only the manner of offering is different."
Which is in contradiction of Scripture.
24For Christ did not enter a holy place made with hands, a mere copy of the true one, but into heaven itself, now to appear in the presence of God for us;
25nor was it that He would offer Himself often, as the high priest enters the holy place year by year with blood that is not his own.
26Otherwise, He would have needed to suffer often since the foundation of the world; but now once at the consummation of the ages He has been manifested to put away sin by the sacrifice of Himself.
27And inasmuch as it is appointed for men to die once and after this comes judgment,
28so Christ also, having been offered once to bear the sins of many, will appear a second time for salvation without reference to sin, to those who eagerly await Him.
Hebrews 9:24-28 NASB