That's the idea that when you die, you can have yourself frozen, and then, at some point when technology has advanced enough, you can be thawed out and repaired and revived and so resurrected.
意思是当你死后， 你可以把自己冷冻起来， 然后，直到有一天，科技 高度发达的时候， 你可以把自己解冻和修复 然后复活。