This paper analyzes travel agency industry in Hainan based on Porter's five forces of industry structure, finding out the structural factors which induce low profit margin of Hainan's travel agencies.

应用波特的行业竞争力理论分析海南旅行社业，得出海南旅行社行业长期赢利能力不佳的结构性原因。

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Homogenized competition is very common in the low-end frozen food markets. Price wars always happen in the same type, same taste category, which leads to a long-term decline of the industry margin.

整个冷冻点心行业中低端同质化竞争较为普遍，同类型、同口味、价格战时有发生，必将导致行业利润下滑。

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Civil Aviation Passenger Transport Industry have low profit margin and easily impact from market risks, which compress capital, labor and technic.

民航旅客运输业是一个资金、劳动和技术密集型行业，行业的利润率低，抵御风险能力弱。

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The revolution in genomics and molecular biology has rescued a segment of the drug industry that for decades was viewed as a low-margin backwater beset by litigation and regulation.

FORBES: Magazine Article