Such flexibility in energy demand can help air-conditioners minimise the strain they put on power grids—another crucial problem.

这种能源需求的灵活性可以帮助空调最大限度地减少对电网造成的压力——另一个关键问题。

1 Mistakes have a way of focusing our attention and putting crucial problems right in our face.

过失能够为我们聚焦注意力和把关键性问题摆在我们面前。

Our hydrophilidae has solved this crucial problem with a thick mass of hair on its belly that keeps the air in place indefinitely.

我们的水龟甲用肚皮下厚密的绒毛解决了这一重大问题把空气一直留在那里。