The second type is based on actual hemoglobin extracted from discarded human or cow blood 第二类是来自废弃的人血和牛血中提取的真正的血红蛋白。
3.
The contraption held small plates of cattle blood and other substance that were covered by a thin membrane to mimic skin 这种精密的装置里放了几小盘牛血和其他物质，上面盖有模仿皮肤的薄膜。
