economical use造句

an economic use of home heating oil; a modern economical heating system; an economical use of her time.

The path selection of the economical use of urban and rural construction land;

Underground parking garage as an economical use of land, isolated noise parking form it appears on the residential Area parking layout and residential environment greatly improved.

In developing small towns, we must make scientific plans, aim for rational distribution, ensure the economical use of land and work to protect the ecological environment.