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美国国家公共电台 NPR Older Patients Can Benefit From Lung Cancer Surgery

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（考研词汇）新版—42

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2006年VOA标准英语-Lung Cancer is the Most Common Cause of De

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My friend Sarah is a vet. I have asked her to tell us about a typical days work. I am a veterinary surgeon and work for a charity called PDSA, which stands for the Peoples Dispensary for Sick Animals. We treat pets belonging to people who are on stat