High electricity bills point to a poor heating system or bad insulation.

高额的电费账单表明供暖系统较差或者是隔热材料不好。

《柯林斯英汉双解大词典》

If air conditioner fluid, tracheal insulation is bad, can also cause the refrigeration, adverse effect.

若空调器液、气管保温不好，也会引起制冷、制热效果不良。

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The general failure model and mechanism of circuit break, loose contact, instant break, male insulation, short-circuit, false matching, poor fix and bad seal were discussed.

阐述了断路、接触不良、瞬断、绝缘不良、短路、误配线、固定不良和密封不良等常见失效模式和失效机理。

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She felt around in the blocked sink with her rubber gloves, poking into the plughole with the toothbrush, pulling at the ends of the fibres caught in the trap, tugging and coaxing until she began to deliver up out of the drain a nasty mass, a thick rope of hair and soap and matted insulation, in a gulp of bad drain smell.

NEWYORKER: Friendly Fire