求翻译：去除血浆中所含免疫复合物、自身抗体等，后输入正常血浆。效果显著，但难持久，且价格昂贵，适用于急重型病例。是什么意思？

Removal of plasma contained in immune complexes, antibodies, etc., and enter the normal plasma. Results are obvious, but it is difficult lasting, and expensive, heavy for urgent cases.

In addition to plasma that is contained in its own such as antibodies and immune complexes, imported after normal plasma. But it is difficult to produce a significant and lasting, and expensive, applied to a heavy cases.

In the elimination blood plasma contains the immunity compound, own immune body and so on, latter inputs the normal blood plasma.The effect is remarkable, but difficult lasting, also the price is expensive, is suitable for the anxious heavy case of illness.

Removal of plasma containing immune complexes, autoantibodies, and so on, after the normal plasma. Effective, lasting, and expensive, suitable for acute and severe cases.

Removal of plasma contained in immune complexes, antibodies, etc., and enter the normal plasma. Results are obvious, but it is difficult lasting, and expensive, heavy for urgent cases.