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例句：
During the interview, she fumbled helplessly for words.
面试时她支支吾吾找不出适当的.话语。
He fumbled with the buttons on his shirt.
他笨手笨脚地摆弄他衬衣上的纽扣。
She fumbled in her pocket for a handkerchief.
她在她口袋里胡乱摸找手帕。
