He actually was present during biological agent production runs. 在生物制劑生產(chǎn)期間，他當時(shí)就在場(chǎng)。
And whether the biological preparation for the treatment was addictive was determined through the chiasm and vicarious experiment. 通過(guò)嗎啡和生物制劑交叉替代試驗，確定生物制劑是否成癮。
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