High oil prices have made it economical to extract .

高油价也使得此类天然气的开采具有了经济性。

But households and businesses are prone to huge swings during peak times and are less economical overall .

但是家庭和事业用电在高峰时段却有巨大涨落，总体上来讲是不节约的。

It 's economical and helps your waistline as well .

这样很经济并且不会使你的腰变成水桶腰。

Economical management is paramount in china .

在中国，经济的健康发展是最重要的。

Some of the most efficient and economical energy solutions combine energy sources .

一些最有效的以及经济的能源解决方案所结合的能源。