以下为句子列表：
英文: Abstract: The structure and operating principle of triangulation probe are firstly briefly introduced in the paper.The analysis and derivation for the reflection property of metal surface are carried out.Several existed problems and solving schemes for me
中文: 文摘:首先简单介绍了三角法测头的结构和工作原理，对金属表面的反射特性进行了分析和推导，提出了三角法测量金属表面时存在的几个问题以及解决方案。
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英文: Case studies ranging from cleaning up toxic waste pollution to endangered species protection probe the clashes between science and politics at local, state, and federal levels.
中文: 个案研究範围由毒性废弃物污染清除到濒临绝种物种保护，深入探讨科学与政治在地方、州政府及联邦层级的利益冲突。
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