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[音频]The shrinking habitat for tigers is one of the biggest problems facing conservationists in India.
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[音频]Two years ago officials launched a program to protect the tigers' habitat.
[音频]Under the program, villagers in Sariska are given about $60,000 to leave their homes and re-settle elsewhere.
[音频]The struggle to balance the interest of wildlife and villagers is likely to end soon.
以下哪些答案列出了一个可用于扩展编号IPACL的有效数字？
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