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。
In a world besotted with gadgetry, few consumer products have generated as much excitement - and head-scratching - as high-definition television.
在这个到处都被小玩意冲昏头脑的世界里，很少有消费品像高清晰电视一样让人激动人心同时又令人哭笑不得。
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。
Megan said, scratching her head.
梅金挠着头说。
"Ay, ay," said Slightly at once, and disappeared, scratching his head.
“好的，好的，”斯赖特力立刻说，挠着头跑开了。
If you're scratching your head right now, you're not alone.
如果你现在正在抓耳挠腮，你不是一个人。
Scratching his head, Tom thought of a good idea.
汤姆搔搔头，想出一个好主意。
He has a habit of scratching his head.
他有一个抓头的习惯。
"Hmm," Persky said, scratching his head. He rapped again, but still no magic. "Something must be wrong," he mumbled.
“唔。”帕斯基抓着头。他又敲了几次，魔法还是不灵。“肯定是哪儿出毛病了。”他咕哝着说。
I have spent a lot of time scratching my head about how to improve my oral English.
我一直绞尽脑汁思考怎么提高我的英语口语。
Nothing prevents you from writing some perfectly hideous code and then scratching your head over how you are going to test it.
您可以很轻松地编写一些非常恶劣的代码，然后费劲脑筋地想办法测试。
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。
Waving can mean welcome and farewell, whereas scratching your head may indicate that you are at a loss.
挥手表示欢迎和告别，而挠头则表示不知所措。
All this might have you scratching your head.
所有这一切可能会让你百思不得其解。
So you're left scratching your head because you have a lot to say but you don't know how to say it.
所以你只有挠头了，因为你有好多话，却不知道该怎么说。
The question of what causes us to dream still has scientists scratching their head.
是什么让我们做梦的问题让科学家挠头不已。
On the girl's shoulder sat a little marmoset scratching its head comically.
在女孩的肩膀上坐着一只正在挠头的小猴子。
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。
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。
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)。
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。
Scratching his head, Liubei answered, "They took me as a peasant."
刘备抓了抓头皮，回答说：“他们说我是乡巴佬。”
Scratching his head, Liubei answered, "They took me as a peasant."
刘备抓了抓头皮，回答说：“他们说我是乡巴佬。”
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