北红橡幼苗是由模仿自然更新人工播育种出，种源一致。

Northern red oak seedlings, originated from a common seed source, were established artificially to simulate natural regeneration.

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这才是产生“红橡庭院”这个大地上的人工结构的真正企图。

This is the authentic intent to create the artificial structure on this land like the Red Oak Courtyard.

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品种包括红橡，白橡，水曲柳，硬枫，软枫，山核桃木，樱桃木，椴木，山毛榉，桦木，波纹软枫，白胡桃，白松木等。

Species include Red Oak, White Oak, Ash, Hard Maple, Soft Maple, Hickory, Cherry, Basswood, Beech, Birch, Curly Soft Maple, Butternut , White Pine, etc.

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