triangular
三角的,三角形的
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square or trigonal double-sided inserts. 正方形或三角形双面插页(或散页)广告。
【主 生】 三棱的,横断面呈三棱的 <Italic>large trigonal shells</Italic>: 大型三棱贝壳。
of or denoting a crystal system or three-dimensional geometrical arrangement having three equal axes separated by equal angles that are not right angles
三方晶系的。
"late 16th cent.: from medieval Latin