Many of these microbes were observed in the infected host by light-microscope . 人们用光学显微镜，在受侵染的寄主中观察到这些微生物。
In the early days, pathologists called any agent of infectious disease "virus" . 在早期，植物病理学家把任何侵染性病害的因子，都叫做‘virus’。
The path of a man carrying plants from the field may then be marked by primary virus infection . 当人从田间带植物，所经之路就可能有第一次被病毒侵染的标志。
Hitler's plan for the invasion of russia soon brought us much-needed respite in the air . 希特勒的侵俄计划，不久就给我们的空中任务带来了极其需要的喘息机会。
About 30 minutes after infection the bacterial cell breaks open(lyses)and the phage particles are released . 侵染后约30分钟，细菌细胞裂解，释放出噬菌体颗粒。
That night the storm reached its greatest fury, and, rending asunder the protecting pines, invaded the very hut . 入夜，暴风猖獗到了极点，刮开掩覆的松枝，侵进了小屋。
The primary purpose is retention of electrical insulation and low-loss properties after extensive exposure to water . 主要目的在于在强烈侵水后保持其电的绝缘性以及其他性能降低较少。
Because some matching always occurs, vertical resistance cannot prevent all allo-infection, but it can only reduce the exodemic . 由于经常发生对应的异状侵染，垂直抗性不能阻止所有的异体侵染，但只能减少外源流行。
Fungi in special circumstances become "parasites" by attacking living tissue of the host species, causing the death of these individuals . 真菌在特殊的环境下成为“寄生物，”侵染寄主种的活组织，引起这些个体的死亡。
At this point it becomes useful to borrow some terms and ideas from plant pathology in which a crucial distinction is made between two kinds of infection . 在这一点上，可借用植物病理学的一些名词和概念，其中在两种侵染之间有严格的区分。
