是形容词词性，意思是成功的，达到目的，例如：
1、On balance， the company has had a successful year.总的来说，公司这一年是成功的。
2、A good training programme is one of the conditions for successful industry.良好的培训计划是企业成功的先决条件。
3、Only time will tell if the treatment has been successful.只有时间才能证明这种疗法是否成功。
