イメージはマスコミの情報に形成される。

An image is formed by the information in the media.

発言の一部だけがマスコミに取り上げられて独り歩きした。

Just one part of what he said got picked up by the media and took on a life of its own.

就職活動の時期は早まる傾向にあり、マスコミ各社の面接がその先頭にたっている。

The job-seeking season is starting earlier each year and it's the mass media that are causing that trend by moving up their job interview schedule.