他们企图恢复英镑币值，但劳而无功。
然而所有的努力似乎都劳而无功。
盖茨是有理由认为乔布斯会劳而无功的。
数十亿美元花在远程气象预报上是一个劳而无功的事。
Billions of dollars have been spent on long-range weather forecasting, but it is a fool's errand.
我试了又试、却都劳而无功，我还很怕被它的前腿踩着。
I made effort on effort, though in vain: meantime, I was mortally afraid of its trampling fore-feet.
我要十分感激他们，把那个劳而无功的工作从我的手里拿过去。
I shall be only too grateful to them for taking a very difficult and thankless job off my hands.
作为回应，企业绝望的试图使用促销、广告和其他市场策略来支撑收入，但往往劳而无功。
In response, companies have tried desperately to prop up revenues using a variety of promotions, advertising and other marketing ploys, often to no avail.
对投资者而言，美国在线和时代华纳合并不能产生效果……就如同西西佛斯推石上山一样劳而无功。
To make the merger (AOL and Time Warner) work for investors... will be like pushing a boulder up an Alp.
对投资者而言，美国在线和时代华纳合并不能产生效果……就如同西西佛斯推石上山一样劳而无功。
To make the merger (AOL and Time Warner) work for investors... will be like pushing a boulder up an Alp.
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