Anchiornis's wrist bone was so wedge-shaped that it could fold its arms to its sides, keeping its arm feathers off the ground as it walked.
近鸟龙的腕骨呈深楔形，因此它可以将前肢折叠到身体两侧，行走时前肢上的羽毛可以悬空，不会拖在地面上。
By decomposing fold and thrust systems into superposed detachment systems, it is possible to simulate extremely complex wedge structures and to do animation of the evolution of the structures.
通过把复杂的褶皱冲断系统分解成一系列迭加的滑脱层系，可以模拟复杂的楔体构造，并提供这些构造演化的二维动画。
The main kinds of the nappes are sheet thrust, Jurassian fold nappe, wedge-shaped nappe and shearing fold-thrust structure, etc.
其主要类型有席状逆冲构造、侏罗山式褶皱推覆构造、楔状推覆构造及剪切褶皱逆冲构造等。
The main kinds of the nappes are sheet thrust, Jurassian fold nappe, wedge-shaped nappe and shearing fold-thrust structure, etc.
其主要类型有席状逆冲构造、侏罗山式褶皱推覆构造、楔状推覆构造及剪切褶皱逆冲构造等。
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