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However, Koch never credited the Hesses for their discovery of bacteriological agar, perhaps because, at the time, he failed to recognize its importance. Even after he received the insight about agar from the Hesses, Koch stuck with gelatine for years. In 1883-84, during his first medical expedition to Egypt and India to investigate cholera, he tried and failed to grow the cholera bacterium on gelatine media in the hot climate of Cairo (despite using a half-open fridge for incubation), only succeeding in the colder winter of Calcutta.
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return f"Item(url={self.url}, title={self.title[:30]}...)"
大量标准化编码工作可以自动完成。这意味着，纯粹依赖熟练度/经验建立优势的工程师，价值空间被挤压。