uneconomical造句

It would be uneconomical to send a brand new tape.
寄一盘新磁带过去不合算。

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。

The methods employed are old-fashioned and uneconomical.
采用的方法很老套,没什么效益。

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