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1·Any of several tropical ferns having more or less sword-shaped fronds including one from which the boston fern developed.

具有剑形复叶的热带蕨类，包括从波士顿蕨演变来的分支。

2·Earth and heavens glitter, and the sword-fern clumps are diamond sunbursts pinned to the silver-sequined ground.

大地和天空都在闪闪发光，蕨草丛恍若别在银色大地上的旭日钻石胸针。