史密森学会档案馆馆长埃菲·卡普萨利斯说：“我们在20世纪70年代中期的时候发现它不见了。”

"We realized in the mid-1970s that it was missing," says Effie Kapsalis, head of the Smithsonian Institution Archives.

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这种社区参与是整个奇卡诺艺术运动的特征，它与60年代中期的奇卡诺民权运动有着相同的发展基础。

Such community engagement is characteristic of the Chicano art movement as a whole, which evolved from the same foundations as the Chicano civil rights movement of the mid-1960s.

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历史学家们注意到了发生在18世纪中期的一个有趣现象，这一现象仍需解释。

Historians had alighted on one interesting factor around the mid-18th century that required explanation.

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I think there was another key one in the mid-90s when we said: we have to go in the server business.

还有一个重要决定是在90年代中期做的,那就是进入服务器行业。

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In fact, he actually emphasized a concept that was first stated by a French philosopher Louis Blanc in the mid-nineteenth century.

事实上，他特别看重,一个由法国哲学家路易·勃朗,在十九世纪中期,率先提出的概念。

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But he's really in the middle of his literary career at that point.

但他那时确实是在,他文学事业的中期。

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