high def
noun [ U ] uk/ˌhaɪ ˈdef/ us/ˌhaɪ ˈdef/
高清晰度(high definition的缩写)
abbreviation for high definition: a system for showing very clear pictures on a television or computer screen or for producing very clear sound
With high def, you can recognize faces in the crowd. 使用高清晰度技术,你可以从人群中识别人脸。