High electricity bills point to a poor heating system or bad insulation.高额电费开支说明供暖系统不足或建筑隔热材料不良。They lived in happy insulation from brutal facts.他们幸福地生活在不受残酷现实干扰的世界里。A wet suit provides excellent insulation.湿式潜水服有极佳的隔热性能...
He snapped the cap on his ballpoint.他吧嗒一声把笔帽扣在了圆珠笔上。There is an overflow of cheap ballpoint pens in the market.市场上圆珠笔泛滥.I changed the ink cartridges in my ballpoint pen.我换了圆珠笔里的墨水芯....