许多人已经安装了绝缘和双层玻璃，但这些还远远不够。
Many people have already installed insulation and double-glazing, but more is to be done.
高质量的玻璃棉绝缘。
绝大多数金属都是电的良导体，而纸张、空气、玻璃则是良好的绝缘体。
Most metals are good conductors of electricity, while paper, air and glass are good insulators.
绝大多数金属都是电的良导体，而纸张、空气、玻璃则是良好的绝缘体。
Most metals are good conductors of electricity, while paper, air and glass are good insulators.
应用推荐