____________ (保护濒危物种)is a great economic burden on the developing nations.Preser

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问题 ____________ (保护濒危物种)is a great economic burden on the developing nations.

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答案 Preservation of endangered species/Protection of rare species/Protection of species in real danger

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[originaltext]Oneofthebiggestproblemsindevelopingcountriesishunger