无尾熊——无尾熊是属于一种树袋熊类的邪恶物种，它专门跳下树攻击人类。
Dropbears - Dropbears are an evil species of koala that fall from trees and attack humans.
西部诸州花了很多钱消灭红荆树，许多专家认为这种树会抢占过多的水，破坏本地物种的栖息地。
Western states have spent a fortune trying to eradicate the tamarisk tree, which many experts believe hogs more than its share of water and damages the habitat of native species.
在动物信息平台中，物种类别是一种树型关系，数据库必须维护这种树形关系的一致性。
In animal information platform, the species category is a kind of tree-like relation, which needs to keep consistency in order to ensure the correctness of data in database.
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