In college, every student needs to take optional classes to get enough credits. Compared to the major, optional class is much more funny and close to the life. Such as how to keep healthy and business manners. More and more students tend to choose the class that is practical.
每个大学生都需要上选修课来获得足够的学分。和专业课相比，选修课就有趣得多，也更接近生活。比如如何保持健康、商务礼仪之类。越来越多的学生倾向于选择实用性的课。

Recently, it has been reported that the optional class about sex education was finished being chosen by students in five seconds. Another class about how to lose weight also very popular. The optional class is not for getting credits for students, but they want to learn something useful, which will be a great help in solving problems. 
据最近报道，关于性教育的选修课5秒钟就被学生抢完了。另一门课教授如何减肥的课也很受欢迎。选修课对学生来说不仅仅是为了学分，他们想学习一些实用，有助于解决问题的知识。

In America, the students need to take the optional class before they go to college. The class is very practical, which can teach them all kinds of skills, such as swimming. The optional class that is opened to students should be more interesting and can pass them the ability to settle life issues. The need of students is the standard for the class. The purpose of education is to cultivate students to be independent and the ability to solve problem. 
在美国，学生要在上大学前就去上选修课。选修课都是非常实用的，可以学到各种各样的技能，比如游泳。选修课的开设对学生来说应该是比较有趣的，可以传授他们解决生活问题的能力。学生的需要是课程的标准，教育的目的是培养学生独立解决问题的能力。