以下为句子列表：
英文: Crude petroleum oil from different oilfields is never exactly identical in composition.
中文: 产自不同油田的原油在成份上从来就没有完全相同过。
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英文: The natural gas piping between Zhong County and Wuhan stretches eastward; also the petroleum oil piping that connects Lanzhou, Zhengzhou and Changsha is laid through Ezhou.
中文: 忠（县）武（汉）天然气管线东延伸段,以及兰（州）郑（州）长（沙）石油管线也贯穿鄂州。
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