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Scientists and doctors cant make their minds up about coffee. One study says its really bad for us and the next report says its good for us. Ive even read that 10 cups a day is good for our brain. I like a cup of coffee at certain times of the day. I

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[00:10.06]Gehrig continued to improve as a player. [00:14.05]By 1924, pitchers for opposing teams were having bad dreams about Lou Gchrig and Babe Ruth. [00:23.04]Ruth hit sixty home runs that year. [00:26.36]Gchrig hit forty seven and won the Americ

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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Oh what a tangled web we weave. Or so it may seem, because many social networks eventually evolve into one of just two states. We either all get along, o

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电话故障

Key Sentences(重点句子) 146．The connection was bad． 通话情况很糟。 147．There was a lot of echo and I couldn't hear well． 回音太多，我听不清楚。 148．I'll connect you agian． 我再为您接通一次。 149．I've just