... methodically economical妥善利用 economical of fuel节省燃料 economical of one's energy〔money〕省精力〔钱〕 ...
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My new car is economical of fuel.
我的新汽车节省燃料[ 不费油]。
My new car is economical of fuel.
我的新汽车节省燃料[不费油]。
And because retailers rejects 360, 000 tons of "substandard" fruit annually in America alone they could be used as an economical way to make fuel.
每年仅美国的零售商遗弃的“不合格”水果就达36万吨，而这些水果可通过一种十分经济的方法来制造酒精。
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