The cryoprotectant is basically a medical-grade anti-freeze, if you like.

如果您愿意， 冷保护基本上医级。

The cryonicists then try to replace some of the body's water with a cryoprotectant, which basically acts like human antifreeze.

然后，人体冷专家尝试冷保护代替人体的部分水分，这冷保护的作基本上类似于人体。