1. 曝光不足：underdevelopment 显影不足 | underexposure 曝光不足 | under frame 底架,底框

2. 照射不足：undercure 欠硫化 | underexposure 照射不足 | underglaze color 釉底颜料

3. 曝光不足;照射不足：underexcitation 欠励磁 | underexposure 曝光不足;照射不足 | underfeature 小起伏地形

4. 欠曝：overexposure 过渡曝光 | underexposure 欠曝 | projector 放映机

noun

1. inadequate publicity

2. the act of exposing film to too little light or for too short a time