It is difficult to know exactly when the shift from gelatine to agar occurred. As often happens for scientific breakthroughs, agar was likely adopted incrementally alongside the use of other growth media. In 1913, for example, the first diagnosis of Serratia marcescens as a human pathogen was made by growing it on agar as well as on potatoes.
03、年夜饭与新年装，拟人化营销的“社交货币”当宠物逐渐成为“家庭的一份子”，春节的叙事也在悄然发生改变，同时浮现出一批具备强传播属性的新消费品类。
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有同乡的朋友，今年也是第一次举家外出围炉，因是临时决定，提前一周才打电话预订，七八家常去的餐馆早已满额，最后只得订一家生面孔。
Dutton and Painter argue that this trauma bond helps explain why people can feel magnetised back to relationships that are objectively bad for them – because the mix of danger and affection is familiar, not because it is healthy.
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