1. High electricity bills point to a poor heating system or bad insulation. 高额的电费账单表明供暖系统较差或者是隔热材料不好。
2. You will need to drain the central heating system before you replace the radiator. 你得先把中央供暖系统的水排净再更换散热器。
3. He had the heating system replaced right away. 他马上换了暖气系统。
4. But he had the heating system replaced right away. 但他马上换了暖气系统。
5. In another firm the workers were constantly complaining about the malfunctioning heating system, but the owners was too busy or too mean to do anything about it. 在另一家公司,工人们不停地抱怨出故障的供暖系统,但老板们太忙或太刻薄,对此不予置喙。