HSK 7-9
绝缘
juéyuán动
to have no contact with; to be cut off from; (electricity) to insulate
橡胶能让电线保持绝缘状态。
Xiàng jiāo néng ràng diàn xiàn bǎo chí jué yuán zhuàng tài.
Rubber can keep electrical wires insulated.
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Appears across levels (7-9) in the HSK 3.0 word list.