The project may be very practical in terms of applying techniques you have learned in the course to a real problem such as classification of email messages.
专题可以是非常实用的，应用你曾在课程中学到的技巧来解决真实的问题，例如电子邮件的分类。
One of the most common USES of classification is to identify spam or unwanted email versus wanted email.
分类最常见的用途之一是，识别垃圾邮件与有用邮件。
A new approach of email classification based on the concept vector space model was proposed.
提出了一个基于概念向量空间模型的电子邮件分类方法。
应用推荐