Science as knowledge production: a pharmaceutical laboratory at Howard University, Washington, D.C., circa 1900. (Image courtesy of the Library of Congress, Prints & Photographs Division, LC-USZ62-35750.是什么意思_Science as knowledge production: a pharmaceutical laboratory at Howard University, Washington, D.C., circa 1900. (Image courtesy of the Library of Congress, Prints & Photographs Division, LC-USZ62-35750.在线翻译_英语_读音_用法_例句