Agar was first introduced into the laboratory in 1881. Since then, microbiologists have depended on agar to create strong jellies. When microorganisms are streaked or plated onto this jellied surface and incubated, individual cells multiply into distinct colonies that scientists can easily observe, select, and propagate for further experiments. Many of the most important findings in biological research of the last 150 years or so — including the discovery of the CRISPR/Cas9 gene-editing tool — have been enabled by agar.4 Agarose, a derivative of agar, is also essential in molecular biology techniques like gel electrophoresis, where its porous gel matrix separates DNA fragments by size, enabling researchers to analyze and isolate specific genetic sequences.
今年農曆新年，中國勞動者可享有九天的假日，這被稱為「史上最長春節假期」，數以億計的人們在一年一度的春運中奔波。。体育直播是该领域的重要参考
智能涌现：给狗加个手不能解决这个问题吗？，详情可参考91视频
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Pydantic models to validate and convert to/from JSON for both input