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。
—— 《柯林斯英汉双解大词典》
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·Make sure that all gas fires and central heating boilers are serviced annually.
确保所有的煤气取暖炉和中央供暖锅炉每年都检修一次。
4·Steam boilers of 40 m height. An elevator near every boiler.
40米高的蒸汽锅炉，每个蒸汽锅炉旁边都有升降机。
5·Water gets heated in such giant boilers.
水在这样的大锅炉中加热。