This instrument is compact in construction, convenient to use, easy to disassemble and install, economical of energy, lower cost and good result of braking.

本装置具有结构紧凑，拆装使用方便、节约能源、成本低、制动效果好等优点。

youdao

OCO is a kind of new biochemical process. It has the function of nitrogen and phosphorus removals and realizes the automatic returns of nitric liquid, so it is economical of energy.

OCO是一种新型的生化反应器，具有较强的脱氮除磷功能，可实现硝态液的自动回流，节约能耗。

youdao

You should be more economical of your energy.

你应该多多节省你的精力。

youdao

Building enterprises and creating new jobs, improving health and education, and providing basic needs such as food and water in an economical and sustainable manner require a balanced energy mix that is suited to the economic, social, and resource conditions of individual countries and regions.

UNESCO: Sustainable Energy Strategies in Low and Middle-Income Economies | United Nations Educational, Scientific and Cultural Organization