With the fast development of science and technology, online courses have been increasingly popular. And as online courses are becoming diversified, some people start to get worried that the day which online course replaces traditional course will come. 随着科技的快速发展，网络课程越来越受欢迎。随着网络课程的多样化发展，一些人开始担心有一天它

With the fast development of science and technology, online courses have been increasingly popular. And as online courses are becoming diversified, some people start to get worried that the day which online course replaces traditional course will come. 
随着科技的快速发展，网络课程越来越受欢迎。随着网络课程的多样化发展，一些人开始担心有一天它会代替传统的课程。
As far as I am concerned, online courses cannot replace traditional ones for that the latter has some advantages cannot replaced by the former. 
就我认为，网络课程是不能代替传统的，因为传统课程有无法被网络课程代替的优势。
For one thing, the biggest advantage of traditional course is that it provides a chance for every student to communicate with teachers face to face, while online course cannot achieve this effect. Attending to a traditional course is not only a process of receiving knowledge, but also an opportunity for students to exchange their minds with their teachers, communicate with their peers and learn to think on their own. 
一方面，传统课程最大的优势在于它为每个学生提供了一个与教师面对面交流的机会，而网络课程则无法达到这一效果。参加传统课程不仅是接受知识的过程，同时也为学生与老师交流思想，与同龄人交流，学会自己思考提供了机会。
For another, traditional courses have more applicability than online ones since the students attending traditional courses have similar understanding or the same amount of knowledge towards a subject, while online courses are difficult to respond the different needs from people with different aims and levels. 
另一方面，传统课程比网络课程更体贴，因为参加传统的课程的学生对同一物体有着相似的理解或者有着同样的知识，而网络课程则很难应对不同需求，目标和水平的人。
Therefore, traditional courses will not be replaced by online ones. But in addition, I advocate that colleges provide some online courses for students to study by themselves besides traditional ones.
因此，传统的课程不会被网络课程而取代。另外，我主张学校应该为学生提供除了传统课程之外还提供一些网络课程让学生自学。