I am the author of the photographic material I submit.

我是所提交照片材料的作者。

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

首先，把一个照相底片覆盖上感光材料。

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Used as a stable overlay material and as a photographic film base.

作覆面物料和照相菲林的片基用。

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Used as a stable overlay material and as a photographic film base.

作覆面物料和照相菲林的片基用。

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