1. Most boilers have a lifespan of 15 to 20 years. 大部分锅炉的使用期限是15到20年。
2. The company started out as a maker of nonpressurized boilers. 这家公司最初是制造无压力锅炉的。
3. His senior vice-president, Juliet Jiang, says, "He made his fortune on boilers." 他的高级副总裁 Juliet Jiang 说:“他靠锅炉发家致富。”
4. Each ship was coal-powered by several boilers constantly kept running by exhausted crews below deck. 每艘船都是由几台烧煤的锅炉提供动力,而甲板下的船员不辞辛苦地维持这些锅炉的运行。
5. For the first time industrial waste, such as ash from the soap-boilers, was collected in the cities and sold in the country as artificial fertilizer. 工业废料,如煮皂炉里的灰,第一次开始在城市里被收集,作为人工肥料在农村出售。