To scratch one's ears and cheeks, indicating extreme anxiety, impatience, or perplexity; to be in a state of fidgety uneasiness.
面对突如其来的难题，他急得抓耳挠腮，却又想不出任何解决办法。
Faced with the sudden difficult problem, he was scratching his ears and cheeks in anxiety, yet couldn't think of any solution.
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