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Noun:
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the act of relieving ills and changing for the better
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a condition superior to an earlier condition;
"the new school represents a great improvement"
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the linguistic process in which over a period of time a word grows more positive in connotation or more elevated in meaning
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以上介紹介紹獨有塑造,受視頻的權保護英文,抄襲必究
海詞英語詞典,十二年品脾