perfect electric and magnetic conductors 完全电导体与磁导体
Unfortunately, because these materials are not good conductors of electric charge, it takes a long time to get the charge in or out of a battery.
不幸的是，因为这些阴极材料都不是良导体，所以充放电需要很长时间。
Because they are immensely strong and are good electric conductors, they are poised for use in a wide range of fields from engineering to medicine.
因为它们强度高、导电性好，适用于从工程至医药的广泛领域。
If there is a voltage difference between these conductors, electric charge is stored.
当导体有电压差值时，电荷就能被储存。
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