以下为句子列表：
英文: Climatological data from fossil pollen, leaves and wood indicate that the Cretaceous forests of northern Alaska consisted of a mixed canopy that included deciduous conifers with an understory of flowering plants, ferns and cycads.
中文: 由花粉、叶子和木材化石蒐集到的气候资料显示，阿拉斯加北部的白垩纪森林有混合型林冠，包括了落叶针叶林以及林下的开花植物、蕨类和苏铁。
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