春天在哪里 mp3:among them the replacement ……翻译

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among them the replacement of WBC by erythrocytes fixed in a sterile medium, suitable for preservation, which at their pH and osmolarity simulate plasma conditions。这句话怎样翻译？请高手指点

其中，白血球被红血球替代了。红血球是固着在无菌基质上的，这有利于红血球的保存。而且基质的pH值和渗透性与血浆环境条件相似。(没有前后文，大概猜测的。请对照前后文连贯其意思，仅供参考)

among them the replacement ……翻译 among them the replacemen……翻译 philosophers among the carrots是什么意思? She dwelt among the untrodden ways among all the students?对不？ How can I deal with the relationship among the collegues? How canI deal with the relationship among the collegues? your ten year-old brother is the only boy among what are the differences among particular, special and unusual ? among all the students为什么错？应该怎么说