木头是热和电的不良导体。
木头是不良导体。
布、木材和橡皮是不良导体。
木头是声音的不良导体。
塑料是不良导体。
各种液体，由于不含有自由电子，是热的不良导体。
Liquids, which contains no free electrons, are poor conductors of heat.
液体由于没有自由移动的电子因而是电的不良导体。
Liquids, which contain no free electrons, are poor conductor of electricity.
他目前面临的困难是，要找到一种物质，同时是很好的电导体又是热的不良导体。
The challenge lies in finding a substance that conducts electricity well and heat badly.
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。
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。
A poor conductor of heat and electricity, glass takes on colours when certain metal oxides are included in the mix. Most glass Breaks easily.
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