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Term 1: Term 2:

(subclass LowlandArea LandForm) Geography.kif 3984-3984 子類 低地地區 and 土地形式
(subclass Plain LowlandArea) Geography.kif 4218-4218 子類 樸素 and 低地地區
(subclass Valley LowlandArea) Geography.kif 4227-4227 子類 谷 and 低地地區


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