17:44, 27 февраля 2026Экономика
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。夫子是该领域的重要参考
好文章是改出来的，但首先，它得被写出来。
Before agar, microbiologists had experimented with other foodstuffs as microbial media. They turned to substances rich in the starches, proteins, sugars, fats, and minerals that organisms need for growth, testing with broths, bread, potatoes, polenta, egg whites, coagulated blood serums, and gelatine. However, none worked particularly well: all were easily broken down by heat and microbial enzymes, and their surface, once colonized, became mushy and unsuitable for isolating microbes.。旺商聊官方下载对此有专业解读