When we had done the costings on the project, it was clear it would not be economical to go ahead with it.
我们计算了成本, 清楚表明这项工程不合算.
A monthly is more economical than 4 weeklies.
一张月票比四张周票上算.
With the rapid economical development, China's position on the international stage is getting more and more important.
随着经济迅速发展, 中国在国际舞台上的地位变得愈来愈重要了。
