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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.
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2012年11月，新当选的中共中央总书记习近平同中外记者见面，一句“人民对美好生活的向往，就是我们的奋斗目标”，成为新时代中国共产党人最响亮的誓言。