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1·A fusion factor exists separate from the virus 'ability to hemolyze.

融合因素未必能与病毒溶血能力分开。

2·They might not hemolyze spontaneously in the bottle, but they did not survive after transfusion.

红细胞可能没有自然地使溶解在瓶里，但红细胞在输血后不会生存。