DNA交链主要由照射于DNA或细菌芽胞引起.DNA cross - links are produced mainly upon irradiation of dry DNA or bacterial spores.目的:观察蜡样芽胞杆菌感染途径.Objectives To observe how cere spore bacilli resulted in swallowing infection.结果:通过细菌学培养鉴定在咽部检出蜡...
The earliest people were roving hunters and gatherers who made primitive stone tools.最早的居民是流动的狩猎者和聚居者,他们制作了一些原始的石器....a roving reporter...流动记者He paused, and his attitude suggested a roving glance at the window.他停了下来, 他的样...