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农业科学 地理隔离 Since the environmental changes and geographic isolation,the species only exist in some habitats and formed isolated distribution,which resulted in community differentitation. 由于环境变迁和地理隔离,资源冷杉只残存于局部生境,形成孤立的残遗分布区。
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Geographic isolation also can proceed slowly, over great spans of time. - 2
Completely Geographic isolation also can proceed slowly, over great spans of time. 完全的地理隔绝也可能在很长一段时间内缓慢地发展而成。 - 3
All this has combined to afflict Africa with the burden of geographic isolation.
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