单词：amokachis
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[00:00.00]Chapter 5 Options [00:01.62]第五章期权 [00:03.24]Unit 9 Options(1) [00:05.43]第九单元期权（I） [00:07.63]Words and Expressions: [00:10.14]challenge eliminate adverse [00:16.64]premium confirmation run a risk [00:23.54]Dialogue
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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Understanding all the genes and molecules involved in human disease is quite a challenge. Thats why scientists study model organisms, like flies and worm
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1. Toyota has announced it will recall more than 400,000 Prius and other hybrid vehicles around the globe to fix brake problems. This recall is the latest in a string of embarrassing safety problems at the world's largest automaker. This recall invol
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Courier Delivery Becomes Race Against Clock in 'Premium Rush' On any business day, crossing the street in Manhattan is likely to mean a close encounter with a bicycle courier. They speed from one one end of the city to the other with rush deliveries.
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Cathy Majtenyi | Nairobi 28 April 2010 In Kenya, small-scale farmers are particularly vulnerable to the vagaries of weather, often losing their entire investment when droughts or floods destroy their crops. Crop insurance is usually too costly for su
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Pump Premium Fuel, Eat Gourmet Food at Washington Gas Station WASHINGTON Imagine putting gas in your car and sitting down to a delicious meal - all in the same place. You can do that in Washington, D.C., where a combination gas station and convenienc
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