“要想一想这里是国内生产总值重要还是绿水青山重要？作为水源涵养地，承担着生态功能最大化的任务，而不是自己决定建个工厂、开个矿，搞点国内生产总值自己过日子。”2019年一次座谈会上，习近平总书记谈及保护“中华水塔”三江源的重要性。
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04:23, 28 февраля 2026Путешествия
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.