Ferns were the first terricolous vascular plants, and still comprise an important part of primary productivity of ecosystems.
蕨类植物是最早
维管植物，至今仍然是
态系统初级产力重要
部分。
Ferns were the first terricolous vascular plants, and still comprise an important part of primary productivity of ecosystems.
蕨类植物是最早维管植物，至今仍然是态系统初级产力重要部分。
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