Aspheric optical parts manufacturing is an acknowledged difficulty and it is uneconomical.
非球面光学零件加工是当前国内外公认的难题.
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Even the successful flying boats proved, in the end, uneconomical.
即使是成功的水上飞机最终也未能盈利。
《柯林斯高阶英汉双解学习词典》
I was taken in by the salesman — the car turned out to be uneconomical and unreliable.
推销员欺骗了我——那辆汽车结果既不经济又不牢靠.
《简明英汉词典》
国企改制以来,政府为推行国有企业改制所付出的巨大成本与较低的收益相比,显然是不经济的。
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