The change to agar was a marked improvement. The jelly is so effective that it is still an invariable ingredient in what is known today as the “Koch’s plating technique” or the “culture plating method.” As Koch himself noted in 1909: “These new methods proved so helpful…that one could regard them as the keys for the further investigation of microorganisms…Discoveries fell into our laps like ripe fruits.”
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，这一点在同城约会中也有详细论述
America was mired in Vietnam abroad and civil unrest at home. But at that moment, it seemed that humanity was united.
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