构造一对称拱坝作为对比拱坝，以白鹤滩拱坝为例，采用有限单元法对拱坝的地形不对称因素进行分析。
The factors of topography asymmetry upon the arch dam are analyzed in the essay by finite element based on Baihetan Symmetric Arch Dam.
招潮蟹的构造不对称：一只螯特别大。
The fiddler crab has an asymmetric build: one pincer is much larger than the other.
勾勒去令人惊异的不对称的条带和半透明的晶体构造。
The blue draws out the amazing asymmetrical banding and translucent crystal formations.
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