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1. The chemical was used as a tracer in the study of molecular structure.
这种化学物质被用作研究分子结构的一个示踪剂。
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2. The compound is known for its ability to change color under UV light.
这种化合物因其在紫外光下变色的能力而闻名。
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3. The dye is often used in printing and dyeing processes.
这种染料常用于印刷和染色过程中。