John Curtis created the first American packaged gum using spruce sap.

约翰·柯蒂斯用云杉树液做出了美国第一个包装口香糖。

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Thus we meet 21-year-old John Curtis who produced the first commercial chewing gum in his home kitchen in Maine in 1848.

由此，我们认识了21岁的约翰·柯蒂斯。1848年，在缅因州家的厨房里，柯蒂斯制作了第一块具有商业性的口香糖。

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"The people who are switching to UKIP are disproportionally Conservative voters, " says Professor John Curtis, of the University of Strathclyde.

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John Curtis opened up the Celtic defence with an incisive pass to Andy Cole, but Douglas was quickly off his line to deny him a shot on goal.

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And it was remembered for arguably the most memorable incident of all, when the Press Association's popular England reporter, John Curtis, mistakenly strolled on to a team bus full of disgruntled Argentine players.

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