之后，投影仪放射一条绿色或红色的光线到产品上，好让使用者知道这个谷物是否是使用者所要求的谷物。

Then, the projector beams a green or red light onto the item, letting the wearer know if the cereal meets user-defined criteria.

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因为目标表面是一个大的，非常复杂的放射体，你需要处理它上面的每一个面，例如在那些uv投影反转的地方，会使图像凹进去而不是凸起来。

Since the target surface is one big, very complex projector you should treat every face on it as if it where an inverse UV projector, sucking up the image instead of projecting it.

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骨和某些器官(如肺)，尤其是适合投影放射。

Bone and some organs (such as lungs) especially lend themselves to projection radiography.

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