It may take either a three-dimensional form, as in games or virtual worlds, or a two-dimensional form as an icon in Internet forums and other online communities.

这个头像可以是网络游戏或者虚拟世界里三维立体的图像，也可以是网络论坛或社区里常用的二维平面图像。

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What's more, they've shown that these amino acids can react with each other to form a different kind of chemical bond to those which usually hold proteins together in their three-dimensional shape.

更重要的是，他们已经表明，这些氨基酸可以相互反应，形成与通常维持三维形状的蛋白质不同的化学键。

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We focus on when the dislocation structure curve in the horizontal and vertical direction after the formation of the three-dimensional influence and the resulting form.

我们关注于当结构曲线在水平和垂直方向错位后形成的三维影响力及其最终生成的形态。

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Biologist James Watson and physicist Francis Crick realized our DNA molecules form a three-dimensional double helix in 1953.

CNN: 5 cool things DNA testing can do

Three-dimensional printers, which gradually layer materials to form shapes, are widely used in manufacturing.

WSJ: Scientists use 3-D printing to help grow an ear