夕阳西下，稻田里洒满金色余晖，收割机依然在忙碌。达博站在田边望向这片充满生机的土地，脸上洋溢着笑容：“我一度想放弃农场，但现在我看到了希望。”中国技术与非洲沃土的这场“握手”，孕育着一个粮食丰收、充满希望的明天。
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This was especially vexing to physician and bacteriologist Robert Koch, who, in seeking to culture his bacteria, “bent all his power to attain the desired result by a simple and consistently successful method,” wrote bacteriologist and historian William Bulloch in his 1938 book, The History of Bacteriology. “He attempted to obtain a good medium which was at once sterile, transparent, and solid” and got some results with gelatine.6 But gelatine is easily digested by many microbes and melts at precisely the temperatures at which the disease-causing microbes Koch wanted to study grow best.。业内人士推荐爱思助手下载最新版本作为进阶阅读