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His condition got worse and worse.; His condition steadily deteriorated.
他的病情恶化，日甚一日。
《新英汉大辞典》
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The patient's condition has deteriorated over the last few hours.
几个钟头前病人的病情已恶化。
youdao
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The patient's condition has deteriorated over the last few hours.
几个钟头前病人的病情已恶化。
youdao