一个新手，用英语怎么说

　　答案：A new user

　　例句：A new user must grasp the concepts and scope of the product quickly or he will abandon it. Thus, the first order of business of the designer is to ensure that the product adequately reflects the user’s mental model of his tasks.
　　一个新手必须迅速掌握程序的概念和范围，不然他会彻底放弃，所以设计师的头等大事就是确保程序充分反映了用户关于任务的心智模型。