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词数:579阅读难度:★★★☆☆建议阅读时间:6分钟SYDNEY,Australia—Climate change and the flow of farm chemicals and coastal sediment(沉积)into the waters that wash over one of Australia’s most significant nature areas,the Great Barrier Reef,pose the biggest threats to its survival,according to a government report to Unesco released early Friday.The report was intended to reassure the United Nations Educational,Scientific and Cultural Organization that those risks were well managed and that the reef should
Words: 579 Reading difficulty: ★★★ ☆☆ Suggested reading time: 6 minutes SYDNEY, Australia-Climate change and the flow of farm chemicals and coastal sediment (sediment) into the waters that wash over one of Australia’s most significant nature areas, the Great Barrier Reef, pose the biggest threats to its survival, according to a government report to Unesco released early Friday. The report was intended to reassure the United Nations Educational, Scientific and Cultural Organization that those risks were well managed and that the reef should