For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself.

Otherwise, Christ would have had to suffer repeatedly since the foundation of the world. But now He has appeared once for all at the end of the ages to do away with sin by the sacrifice of Himself.

So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.

so also Christ was offered once to bear the sins of many; and He will appear a second time, not to bear sin, but to bring salvation to those who eagerly await Him.