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1.The fuel tube is essential for the engine to operate efficiently.
燃料管对于发动机高效运行至关重要。
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2. The engineer carefully inspected the fuel tube before welding.
工程师在焊接前仔细检查了燃料管。
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3.The fuel tube was damaged during the accident and needed to be replaced.
事故中燃料管受损，需要更换。