感光材料、数字照相机都是照相器材。

Light-sensitive materials and digital cameras are all photographic equipment.

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首先，把一个照相底片覆盖上感光材料。

First, a photographic plate is coated with a light-sensitive material.

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首先，照相的地板要覆盖有感光材料，并把他们放置进去以便天文望远镜看到的图像能被记录下来。

First, the photograph plate is coated with light-sensitive material. Then the plate is position so the image seen by telescope is recorded on it.

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