improper performance英语标准发音：improper performance英式发音：美式发音：翻译中文不当履行improper performance - 基本释义[词典1]N.[名词]不适当履行improper performance - WEB词典improper performance翻译过错责任不适当的履行英语 参考资料： 1.百度翻译：improper performance2.有道词典：improper performance3.爱词霸：improper performance
