词典释义：
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Once they made him wear a brace but he fretted so he was downright ill.
有一次，他们让他戴上支架，但他焦躁不安，因此病得很重。
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His first betrothed heard of this, and fretted so much about his faithfulness that she nearly died.
他的第一个未婚妻听说了这件事，为他的不忠烦恼不已，几乎要死了。
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His Disciples fretted about food.
祂的门徒为食物担心。
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Investors also fretted over Spain and Portugal.
同时，投资者还担心西班牙和葡萄牙。
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But some have fretted openly about property bubbles.
但有人公开担忧房地产泡沫。
词根 fret
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fretful adj. 焦躁的；烦燥的；起波纹的
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fretfully adv. 焦急地；焦躁地
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fret n. 烦躁；焦急；磨损 vi. 烦恼；焦急；磨损 vt. 使烦恼；焦急；使磨损
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fretfulness n. 焦躁