如果你现在正在抓耳挠腮，你不是一个人。
这意味着你抓耳挠腮以使自己想起你遗忘的东西。
It means to scratch your head in order to help you remember something you've forgotten.
月亮镇，宾州——这儿的人这两天抓耳挠腮的想：“麦凯恩怎么跑这来啦？”
MOON TOWNSHIP, Pa. - People are scratching their heads: Why is Senator John McCain here?
众猴听了，个个抓耳挠腮，说：“井这么深，怎样才能把月亮捞起来呢？”
All the macaques tweaked their ears and scratched their cheeks, saying:"The well is so deep. How can we scoop up the moon?"
当我敲击着对这件事的想法时，似乎要弄清这个问题的本质是一件非常让人抓耳挠腮的事。
While tapping out my thoughts on the matter, it seemed painfully clear how difficult of a question this really is.
看到别人抓耳挠腮，随即发现自己也有了挠痒痒的冲动，这种情况不只在你一人身上发生。
If ever you have felt a previously undetected itch when you notice someone else scratching, you are not alone.
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？
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?
虽然给小费的习俗会让游客们抓耳挠腮不得其解，但专家们称，给小费有一些基本经验可以遵循。
While these conventions can leave travelers scratching their heads, experts say that there are a few basic rules of thumb to following about tipping.
正如法学学者在原始状态下就迷失了一样，公司管理的头头们也急得抓耳挠腮，尝试去指定新的规则。
Like scholars of jurisprudence lost in a state of nature, corporate-governance gurus are scraping around, trying to formulate new rules.
他们的成绩会受影响，或者他们清楚而明白的学到知识，要不就是听不明白，抓耳挠腮，不明白为什么他们在课堂上没学到东西，成绩那么差。
Or they won’t, and scratch their heads as to why they’re not really learning anything in class and getting poor grades.
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。
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。
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.
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