...在安史之乱和以后的几年混战中,杜甫更是描绘了一幅幅老百姓求生无望求死无门...舍勒传记读后感 卡尔·威尔海姆·舍勒(Carl Wilhelm Scheele) ,瑞典著..
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Oxygen was discovered by Joseph Priestley, in Wiltshire, in 1774, and by Carl Wilhelm Scheele, in Uppsala, a year earlier.
NEWYORKER: In the Air
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