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

如果您愿意， 护剂基本上是一种医级防剂。

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

然后，人体专家尝试一种护剂代替人体的部分水分，这种护剂的作基本上类似于人体防剂。