1、Pteridophytes were dominant during the Carboniferous period.
[碳iferous时期,蕨类植物占据了主导地位。]
2、Ferns are a common type of pteridophyte found in many different environments.
[蕨类是一种常见的蕨类植物,在许多不同的环境中都可以找到。]
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