... poor conductor ==> 不良导体 poor conductor of heat ==> 不良导热体 poor contact ==> 接触不良 ...
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Wood is a poor conductor of heat and electricity.
木头是热和电的不良导体。
Wood is a poor conductor of heat and electricity but a metal conducts, well in both cases.
木材不容易传热也不容易导电，而金属却易于传热导电。
A poor conductor of heat and electricity, glass takes on colours when certain metal oxides are included in the mix. Most glass Breaks easily.
是电和热的不良导体；混合物中含有某些金属氧化物时，玻璃会呈现出不同的颜色。大多数种类的玻璃容易破碎。
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