The yield difference between ravine rainforest and secondary forest was not significant.

沟谷雨林和次生林下阳春砂仁果实产量差异不显著.

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The minimums of similarity coefficient were between the natural secondary forest and the rests.

封山育林区和天然次生林区物种丰富度指数高于其他样地.

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Part of area which is not under cultivation may have the appearance of a secondary forest.

林地中尚未耕作的部分看上去如同次生林.

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