用Mp3背六级单词054

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Alabama Airlines has notified its pilots to stop topping off their fuel tanks. Alarmed, pilot Buck Rogers sent a copy of the memo to Time Magazine, which investigated the matter. It discovered that AA was reacting to a 50-percent increase in fuel pri

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This is Scientific American's 60-Second Science, I am Cynthia Graber. This'll just take a minute. Whales and dolphins were molded by evolution to glide through water. Weve been trying to create streamlined designs ourselves for structures such as win

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In fact,what happened to that flight is so similar to what would happen seven years later in Guam that it's a good place to start our investigation into the mystery of Korean Air's plane crash problem. 该事故同七年后发生的关岛事故极其相

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认真看待自己，才会得到他人的尊重

I stand on the edge of the dance floor watching couples glide, spin, and groove as they dance the West Coast Swing. The tempo of the music is fast, but the beating of my heart is faster. I want to dance, but I'm afraid I'm not good enough. 我站在舞

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Work without Hopeby Samuel Taylor ColeridgeAll Nature seems at work. Slugs leave their lairThe bees are stirringbirds are on the wingAnd winter slumbering in the open air,Wears on his smiling face a dream of Spring! And I the while, the sole unbusy t

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