如果你发现图片中只用到了4种颜色，而在调色板的中显示的256色的颜色槽，那么这张图片就还有压缩的空间。

When you see an image useing 4 colors and a 256 color "slots" in the palette, there is room for improvement.

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该种抛物面太阳能收集槽已采用这种新型电池板、它能将照射在上面日光焦中在抛物面的焦点部位，与以前不同的是，它能将水温加热到1450华氏度（788摄氏度）。

This new panel has been used in a new dish design which also focuses the sunlight into one spot, but this time to a temperature of 1450 degrees F.

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提出了一种适用于各种金属板贴塑的前处理工艺，着重介绍了脱脂和磷化的工艺配方、特点及槽液的维护。

Pretreatment process for PVC laminating on different thin metal sheets was introduced. Formula, strengths and maintenance of degreasing and phosphating process were emphasized.

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