Grace Robertson started as a photographer with Picture Post in 1947.格雷斯·罗伯逊于1947年参加工作，做了《图片邮报》杂志的一名摄影师。Robertson is not far off her target.罗伯逊离她的目标不远了。Robertson was a doer, not a thinker.罗伯逊是位实干家，不是空想家。...
Microbes are too small to be seen by the naked eye.微生物很小,肉眼看不见....microbes in the soil which nourish the plant.土壤中为植物提供营养的微生物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...
Sir Robert made his announcement after talks with the President...在与总统会谈之后，罗伯特爵士发表了声明。Robert Gates sat before them, almost penitent about the past.罗伯特·盖茨坐在他们面前，对过去的事几乎无颜以对。To his 19th-century peers, Robert Brown was the ...