The plastic product still needs to undergo biological testing, and the hemoglobin replacement polymer is not yet a total blood substitute, but it is a crucial first step.

• ” 对这种塑胶产品还需要进行生物试验，替代血红蛋白的高分子还不能完完全全地作为血液的替代品，但这算是迈出了至关重要的第一步。