4In 2007, Barrangou et al. demonstrated for the first time the function of CRISPR/Cas9 as a defensive mechanism of bacteria against bacteriophage attacks by a technique called “plaquing” which builds upon the technique of “plating” bacteria on agar. Plaques of viruses on agar are areas without growth of bacteria due to viral attacks.
要知道，欧美游艇产业的繁荣，并非一时靠资本推动，而是历史积淀、经济基础、消费文化、产业体系、基础设施与技术创新长期共振的结果。
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Less than two months ago, US forces seized Venezuelan leader Nicolás Maduro, Cuba's close ally, and stopped his successor from supplying the country with oil.