When a river forms a loop on flat terrain, undercutting occurring on the riverbanks closest to each other can eventually connect the Banks, giving the river a shortcut.
当一条河在平原地带形成了一个圈圈，侵蚀会造成互相挨得很近的两个河岸最终连在一起，使得河流有一条捷径。
An organic compound, C10H7OH, occurring in two isomeric forms, alpha-naphthol and beta-naphthol.
萘酚一种有机化合物，c10h7oh，存在于两种异构形式。
The gold is less evenly distributed in the ore in forms of natural gold and silver-gold, and occurring state are intergranular gold and fracture gold.
金矿物有自然金和银金矿，在矿石中分布很不均匀，以粒间金和裂隙金为主要赋存形式。
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