The Institute spends a lot of time scratching its head about how to boost American productivity.
这家研究所花大量时间绞尽脑汁思考怎样推进美国的生产力。
The claim that removing the legal cloud over foreclosure would help the housing market - in particular, that it would help support housing prices - leaves me scratching my head.
宣称驱散取消抵押品赎回权行为上空的法律乌云有助于房地产市场——尤其会支持房子的价格——的说法让我挠头不解。
Similar feelings of bewilderment were much in evidence throughout the rest of the town, as residents tried to return to their ordinary lives, often wearing expressions of head-scratching bemusement.
同样困惑的情绪也弥漫在小镇上的其他经历者心中，正如大家都试图回到正常的生活状态一样，他们经常表现出难以置信的困惑。
We've all had a few head-scratching moments with generics, but far and away the trickiest part of generics is wildcards.
对于泛型我们都经历过一些痛苦的回忆，但毫无疑问通配符是最棘手的部分。
Even the smoking-lung cancer connection took decades of epidemiological head-scratching to figure out.
尽管吸烟能导致肺癌这个令人挠头的难题也是经历了数十年的探索才最终得出了结论。
I have been scratching my head all week and searched for the reasons - not excuses - as to why we have not performed to our capabilities.
我整个星期都在抓头寻找原因，但不是借口，到底为什么我们没有施展出我们该有的水平。
It wasn't so long ago that trying to get Linux onto your system hard disk often comprised hours of head-scratching, system resets, and searching the Internet for the right drivers.
不久之前，在您的系统硬盘上安装Linux往往会花上您数小时去苦思冥想、进行系统重启、在因特网上搜索适当的驱动程序。
But in chapter 17, Mr Wilczek suddenly talks of a green and purple charge, leaving the reader scratching his head.
而在第十七章中，威尔茨克却突然谈到了绿色子和紫色子，另读者一头雾水。
But the result is bound to bring more chin-stroking and head-scratching: Why does Messi's Barcelona steamroll the opposition while Messi's Argentina underachieves?
但是结果必然更加令人抓耳挠腮：为什么梅西的巴萨神挡杀神而阿根廷却是潜能发挥不良呢？
Thus, you might be scratching your head and trying to figure out how to get the work done.
因此，您可能会刮伤你的脑袋，并试图找出如何让所做的工作。
If you find yourself scratching your head trying to recall a name, run apropos (or the equivalent man -k). For example, if you're hunting for a calculator, simply type apropos calculator.
如果您正在努力回想一个命令名，那么试试apropos(或等效的man -k)。
It may take a while, but it can save some serious head scratching in the future.
这可能需要一段时间，但它也许能在未来拯救一些重大失误。
In response, Dash simply drew a stick picture of himself scratching his head, with a thought bubble containing the answer.
在回答中，达西仅仅画了一副自己正在挠头的简笔画，头上再加一个“思考中”的泡泡，里面写着正确答案。
The question of alien life is more commonly associated with the extraterrestrial variety, a quest that has NASA scratching its head over not only where to look, but how to identify it if found.
关于异形生命的问题被更普遍地与地外物种相关联，而这是一个让美国航空航天局（NASA）抓耳挠腮的探索，不仅是去哪儿找，还有就是如果找到了该怎么识别它。
He was scratching his head like a man awed by the sudden realization of the immensity of the world.
他挠着脑袋，仿佛突然间被世界的广阔惊呆了。
He was scratching his head like a man awed by the sudden realization of the immensity of the world.
他挠着脑袋，仿佛突然间被世界的广阔惊呆了。
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