2 sentences

1. 他是新闻界的一位老兵，见证了行业的兴衰。

   tā shì xīn​wén​jiè de yī wèi lǎo​bīng, jiàn​zhèng le háng​yè de xīng​shuāi.

   He is a veteran of the journalism world and has witnessed the industry's ups and downs.

   Source: Dong Chinese Dictionary

2. 他在新闻界工作了二十年，积累了丰富的人脉。

   tā zài xīn​wén​jiè gōng​zuò le èr​shí nián, jī​lěi le fēng​fù de rén​mài.

   He has worked in journalism for twenty years and has built an extensive network.

   Source: Dong Chinese Dictionary