太阳能的高效利用可以显著降低家庭的电费开支。

The effective ___utilisation of solar energy can significantly reduce household electricity bills.

这家工厂的设备利用率很高，几乎每天都在运作。

The ___use of equipment in this factory is very high, running almost every day.

这家工厂专注于木材的利用，将其加工成高质量的家具。

The factory specializes in the ___utilisation of wood, turning it into high-quality furniture.