2 sentences

1. 他从事警务工作已经二十年了。

   tā cóng​shì jǐng​wù gōng​zuò yǐ​jīng èr​shí nián le.

   He has been in police work for twenty years.

   Source: Dong Chinese Dictionary

2. 警务总监向媒体通报了案件进展。

   jǐng​wù zǒng​jiān xiàng méi​tǐ tōng​bào le àn​jiàn jìn​zhǎn.

   The Commissioner of Police briefed the media on the progress of the case.

   Source: Dong Chinese Dictionary