An example of a necker cube and an Impossible cube (one arm runs across the other but is still straight, which can't happen in 3D; it's an optical illusion). 多维数据集 多维数据集内克 光学幻觉 不可能的多维数据集和多维数据集内克
The difference of two cubes. Typeface is Tuffy (public domain, created by Thatcher Ulrich) from openfontlibrary.org 多维数据集 差异 相对补 两个多维数据集的差异
red set green icon right arrow double button navigation arrows Green Right Double Arrows Set clip art 绿色 权利 双 绿色右双箭头设置剪贴画
An abstract illustrator vector set of circles and drips created by www.creativenerds.co.uk Circles And Drips Set 圆 滴灌 设置 圆和滴水集
Set of 35 Round Buttons in three colors (Brown, Green, Blue). 5 Symbols in each color. Matte finish. 按钮 设置 一轮 圆形按钮符号
This is a collection of a few of my older vectors before i removed them and a load of new ones to. a total of 60 all together! The file is an adobe illustrator CS3 file, but should be fine with older versions as well, if u get probs then note me SS Collection 集合 箭头 巴士 SS 集合