牛吊龙是牛背上的牛里脊部分开发者_开发知识库，是依附在里脊外的一层肥瘦均匀的嫩肉，即西餐中的西冷与肉眼，其特点是鲜甜而弹牙，肥而不腻，瘦而不柴，肉汁饱满，吃起来非常鲜嫩，而且吊龙是牛身上脂肪最少的部分，
I have a a menu that is a CALayer that will slide across the screen to a given point.I want the effect where the menu will go a little past the point, then a little before the point, and then land on
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