对于建筑业主来说,采暖和制冷费用在总的支出中相对不突出的时代已经离我们十分遥远了。如今,石油价格虽有回落,但仍很不稳定。天然气和煤炭的价格也在上涨。所有这些因素都导致采暖和制冷费用的上升。 For building owners, the time when heating and cooling costs are less prominent in total spending has come a long way. Today, oil prices are still falling, but they are still very unstable. The prices of natural gas and coal are also rising. All of these factors lead to increased heating and cooling costs.