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