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.
2024年12月23日 星期一 新京报
，这一点在91视频中也有详细论述
比如前面提到的老年人的AI玩具，实际关注的不仅是银发人群本身，更是整个适老化市场。据称唠唠鹰的研发阶段，负责场景需求调研的团队先后走访了全国20余座城市，收集了5000余名不同年龄段、教育背景的老年用户的反馈。这些真实的反馈能够帮团队更加精准地锁定老龄化场景痛点，比如部分农村网络稳定性差，就优化相应的内容缓存功能，再比如更慢的语速、更简化的按键操作等等。
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