The best efficiency is economic forest, the best zoology efficiency is mixed forest.
退耕还经济林的效益值最大，生态效益以还混交林为最好。
This commercial forest is very productive and can generate good economic returns.
这片经济林的收益很好，经济效益很高。
The economic losses will make Forest Park difficult to survive.
经济上的亏损将使森林公园难以为继。
The economic losses will make Forest Park difficult to survive.
经济上的亏损将使森林公园难以为继。
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