The clear or opaque pieces surround an acrylic diffuser, which can be fitted with an optional color filter.

透明的或不透明碎块环绕着丙烯酸扩散，它可以安装一个可选的彩色滤光片。

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Step 11: Alter the color of the Star Diffusion effect (optional).

第十一步：调整星光柔化效果的颜色(可选项目)。

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The color choices are of course optional.

颜色的选择当然是随意的。

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An optional color viewfinder is available.

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Though this machine was announced with a Core i3 CPU, only the AMD option remains available here in the US. And while the dm1z is a tad heavier than the Aspire V5 (3.2 versus 3.05 pounds), we like its patterned lid -- and the optional red color scheme.

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The Turbo Express was about the size of a Game Boy but had a sharp active-matrix color display and could even be used as a portable TV with an optional tuner.

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