Ferns were the first terricolous vascular plants, and still comprise an important part of primary productivity of ecosystems.
蕨类植物是
陆的维管植物，至今仍然是生态系统初级生产力的重要
。
Ferns were the first terricolous vascular plants, and still comprise an important part of primary productivity of ecosystems.
蕨类植物是陆的维管植物，至今仍然是生态系统初级生产力的重要。
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，
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