Please correct my translation

In recent years, traditional media has shown a declining trend because new online media is developing so fast.Even though, It doesn't necessarily mean traditional media has lost its market. When it comes to reading the news, people are accustomed to traditional media like newspapers.

'Has shown' is the present perfect tense. It is a tense that is used to describe a situation that has happened in the past which has a relationship with something that is happening in the present. The timing of the past event is not important. 

Well done Zhouko Jiang! Not an easy passage to write. 

Please correct my translation

Hello there!

You seem to have expressed your point quite well. But here's a corrected version: 

In recent years, the trend for traditional media has shown a decline while new media has developed so fast. However, this doesn't necessarily mean that traditional media have lost their market. When it comes to reading news, people are still comfortable with traditional media, like the newspaper.

Please correct my translation

In recent years, there has been a declining trend in traditional media as new forms of media have been developing quickly. However, it doesn't necessarily mean traditional media will lose its market position; when it comes to reading news, many people are  still accustomed to traditional print media like the newspapers.

I hope this helps

Casey