They extracted the plasma and returned the blood to the donor.
他们抽取血浆，然后将剩余成分返还给捐赠者。
2
The standard helps to maintain a steady and reliable donor population and supply of quality plasma.
这个标准帮助保持一个稳定和可靠的捐赠人口，并能供应质量可靠的血浆。
3
It was agreed that the Blood Donor Program must continue to operate at its present level (300,000 bleedings per month) and that plasma processing facilities be used without interruption.