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1. The new graded insulator is more durable than the old one.
这款新型分级绝缘体比旧款更耐用。
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2. The engineer used a graded insulator to improve the electrical conductivity of the circuit.
工程师使用分级绝缘体来提高电路的电导率。
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3. The graded insulator was designed to reduce the risk of electrical shocks during lightning storms.
分级绝缘体的设计旨在减少雷暴期间触电的风险。