单词：Cartan calculus
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The streetcar turned onto a crowded, busy street. Lively music blared from restaurants and dance halls. We're in the French Quarter now, and you're thenext stop, the conductor said to Jack and Annie. Head down St. Peter Street toward the MississippiR
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It was midday at 34th Street and Broadway. A shish kabob vendor was pushing his big cart onto the sidewalk. A mango vendor was blocking his progress. She had a much smaller cart. A young woman in a Skyride T-shirt said, Stop, mister! You're going to
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