festered
v.
（伤口/破口）化脓( fester的过去式和过去分词 );
溃烂;
（不快的思想或情感）更加苦恼;
愈益恶化;
例句:
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Jealousy festered his mind.
嫉妒使他苦恼.
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Wounds festered in the damp, they never healed.
伤口在潮湿中溃烂, 永远也不能愈合.
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The unrequited love festered in her mind.
单恋使她苦恼.
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This has festered over football for eight months.
来自THETIMES
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The whining and surliness continued and festered.
来自WSJ
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Tensions between Burma's Rakhine Buddhists and ethnic Rohingyas have festered for decades.
来自VOA