Fat is an excellent insulator against the cold.脂肪是极好的抵御寒冷的绝热体。Any two conductors separated by an insulator are said to form a capacitor.由绝缘体隔开任何两个导体就组成电容器.The FRP is an insulator to electricity, so it is good in safety.因...
Fat is an excellent insulator against the cold.脂肪是极好的抵御寒冷的绝热体。Dry air is a good insulator, but sea water is not.干燥空气是一种好绝缘物, 海水则不是.The atoms of an insulator hold their electrons very tight.绝缘体的原子把电子抓得很牢....
A group of protesters gathered outside, chanting and lobbing firebombs.一群抗议人士聚集在外面，边喊口号边扔燃烧弹。Police segregated the two rival camps of protesters...警察把两个敌对阵营的抗议人群隔离开来。Your captain said that he had problems with war protes...
High light efficency , concentrated light, no additional ballast, which can take place of incandesce lamp, reducing investment fees.特点:发光效率高,光线集中, 不需要附加镇流器, 可直接与白炽灯互换使用, 减少投资费用....