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economical

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He is more miserly than economical.(与其说他很节省，不如说他很小气。)
Even so, LEDs can still be economical.(即便如此，LED依旧经济。)
We must find economical methods for extracting oil from shale.(我们必须找到从页岩中采油的经济方法。)
Buying in bulk is more economical than shopping for small quantities.(大批采购比少量购买更经济实惠。)
Wind power is most economical in areas with steady winds.(在风力稳定的地区，风力发电是最经济的发电方式。)
A more economical approach was to use a sign to express not a whole word but a single syllable.(更经济的方法是使用一个符号来表达一个音节，而不是一个完整的单词。)
He was economical in all areas of his life.(他在生活的各个方面都精打细算。)
"That's why, when you walk, it's so economical and USES so little energy," he says.(“这就是为什么在你走路时会如此省力，”他说道。)
It is usually economical to buy washing powder in large quantities.(大量购买洗衣粉通常要省钱些。)
I want most economical packing.(我要最经济的包装。)

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