这个包裹着生物材料的小球的是我们身体里数十亿的细胞能够相互配合协作的媒介，通过它，我们的才能保持意识清醒，行动敏捷。
That little ball packed with biological material is the medium through which all of our billions of cells coordinate with each other to keep our conscious stable and our bodies responsive.
水被认为对生命是至关重要的，因为水是营养物渗入细胞以及废物排出的媒介，也是关键新陈代谢反应的溶剂。
Water is thought to be crucial for life because it provides a medium for nutrients to diffuse into cells and wastes to drift out, and a solvent for critical metabolic reactions.
生长因子在皮肤中的广泛分布提示它们是皮肤细胞调节的基本信息媒介。
The comprehensive distribution of these growth factors on skin implies that they may be the basic message media to skin cells.
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