VOA慢速英语2012.09.04 的, somehow, noticed, culture

Rebecca949

In nineteen twenty-eight a British scientist made a "chance observation." He noticed that some mold had grown in bacteria in a culture plate in his laboratory. Molds can do that. 1928年，一名英国科学家做了一次“偶然的观测”。他注意到，一些霉菌在他实验室的培养皿里的细菌中生长出来。霉菌可以做到这点。
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alice560

chance observation

zhant220

but this mold that is somehow gets into plate have the ability to kill the bacteria around it. The scientist Alexander Fleming found that the mold was a member of a common group, known as penicillin

jizhao19960124