Heat islands develop best under particular conditions associated with light winds, but they can form almost any time.
在和风相关的特定条件下，热岛会形成最佳状态，但它们也几乎可以在任何时候形成。
2
Solar energy, whose time has come, is very suitable to heat water or make electricity.
太阳能的时代已经到来，它非常适合用来加热水或发电。
3
He said the Octagon would soon switch to a fuel cell system for heat and electricity, partly to cut energy costs at a time of a depressed rental market.