economical of

基本解释

My new car is economical of fuel.
我的新汽車節省燃料[ 不費油]。
He is economical of money.
他節省金錢繕。
In this article, the concepts concerning recycled concrete are defined and the feasibility to technique and economical of recycle concrete are analyzed.
本文首先闡述了再生混凝土技術的概唸；分析了再生骨料配制混凝土的技術和經濟可行性；

Well, I think possibly they see a nuclear weapons as a more economical way of defending themselves.
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While the law did not name MTBE, the chemical was a more economical means of oxygenating gasoline than the obvious alternative, ethanol.
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Solar thermal power, which is the most economical form of solar power production, additionally consumes at least double the water of conventional power plants.
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