amelioration的反义词

One of the most startling proposals for amelioration, in fact, came from Wall Street.实际上, 最令人注意的改良建议之一出自华尔街.I've heard that Liebig has made some wonderful discoveries in the amelioration of soils.我听人说利比黑在改善土壤这方面有过很了...

amelioration的音标：amelioration的英式发音音标为：[əˌmi:lɪə'reɪʃn]amelioration的美式发音音标为：[əˌmiljə'reʃən]...

n.改善，改进...