He had developed co-operation with nature, and hence the economical use of time, to a fine art.

Setting up a viable society with the most economical use of resources is mine.

They are not, however, the most economical use of your time.

The development of drugs is very important to medicine, but it also has strong economical and political uses.

"It's the most perfect resolution of his economical use of space, for which he was so famous."

There are three main economical uses for this family.

You may wonder at my repeated emphasis on the economical use of money in politics.

She continued as a beloved concert artist, with ever more economical use of reduced vocal means.

This economical use of space is a big selling point in tiny Japanese homes.

In a time of economic crisis, it is particularly important to make economical use of taxpayers' money.