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He's useless at DIY. He won't even put up a shelf.

他的动手能力很差，甚至连搭个架子都不会。

《柯林斯英汉双解大词典》

Astronauts will make a final attempt today to rescue a communications satellite from its useless orbit.

宇航员们今天将做最后一次尝试，把一颗通讯卫星从它无用的轨道上拯救出来。

《柯林斯英汉双解大词典》

But Mr. Mindon was proud to be rich enough to have a perfectly useless room in his house.

VOA: special.2009.01.31

I am at the point of believing," he says, "that my labor will be as useless as the commonwealth of Plato," he says in a moment of sort of uncharacteristic despair, "will be as useless as the commonwealth of Plato."

我就快相信，自己所做的这一切都将是无用功,就像柏拉图所建立的理想国一样,他曾异常绝望地这样说，就像柏拉图的理想国一样毫无意义“

耶鲁公开课 - 政治哲学导论课程节选

If you just scramble a sentence, it's pretty useless because the recipients are never going to be able to reverse the process.

如果你只是加密一个句子，这是毫无用处的,因为收件人没法将这个句子,反加密出来。

哈佛公开课 - 计算机科学课程节选

Economists set themselves too easy, too useless a task if in tempestuous seasons they can only tell us that when the storm is long past the ocean is flat again.

FORBES: Niall Ferguson's Keynes Was Childless, Gay, So Don't Worry About The Long Term Rumpus

Of course, a smartphone is useless as a travel tool unless you load it up with apps.

BBC: Lonely Planet��s travel technology predictions for 2011

No, we don't think this Xbox 360 case mod oddity takes the cake, but it ranks fairly high up there in the long list of mods that are impressive from a technical standpoint, but next to useless from a practicality stance.

ENGADGET: Divineo offers up LCD-infused Xbox 360, practicality in doubt