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

如果您愿意， 冻保本上是一种医级防冻。

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

然后，冻专家尝试一种冻保代替的部分水分，这种冻保的作本上类似于防冻。