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....
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...
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...
他不仅拒绝收礼, 而且严厉地批评了年轻的送礼者.Comp : He not only refused the gift, also severely criticized the young sender.他不仅拒收了这个礼物, 还严厉批评了送礼者.Not only did he refuse the gift, he also severely criticized the sender.大约就在这个时候,简收到了一份厚礼,这是一架钢...