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Teens Express

Swimming with shark

作者:Gerri Miller, Mother Nature Network
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与鲨共舞的女孩。 词数 516 建议阅读时间 7分钟 测试见7版

In the ocean, sharks are the top predators (捕食者), not the prey (猎物). But the fearsome fish face a powerful enemy in humans, who have made their numbers much smaller by commercial fishing.
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