... adrenergic receptor material 释义：肾上腺素能受体介质 marking medium 释义：印迹介质 alkaline medium 释义：碱性培养基,碱性介质 ...
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Besides, the marking medium is paper, which can't be easily replicated and transported, and it is difficult to store and transport.
阅卷工作的介质是纸质试卷，不方便进行复制和远距离运输，使得试卷的保管和运送工作变得复杂。
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