profitable exercise英语标准发音：profitable exercise英式发音：美式发音：翻译中文有利可图的练习profitable exercise - 基本释义[词典1]有益的练习profitable exercise - WEB词典profitable exercise有益的练习 参考资料： 1.百度翻译：profitable exercise2.有道词典：profitable exercise3.爱词霸：profitable exercise
