The top layer of soil is a different color. Scrape it away and make straight lines, which are easy to spot from above.

Dill告诉我们，土的上层和底下的颜色是不同的，把上层的土挖掉，呈现出一条颜色相异的直线壕沟便于人们从上空发现你。

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Fault links are supported as well, shown with double-lines in a different color.

还支持采用不同颜色的双线显示的错误链接。

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Because the background bitmap can only be black and White (Grayscale), all the lines will be created in the red layer, (or any color different than black)?

由于位图的背景只能是黑与白(灰度)，所有的线将建立在红层，(或任选任何颜色不同于黑色)？

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