光学、声学 光学 visual line 视线 line of sight 视线†
line of sight 视线 sight 视线；观测，瞄准
line of sight; line of vision; visual line 视线
计算机应用 计算机辅助设计与图形学 释文 view ray 视线
- urban regime
- urban regime theory
- urban regionality
- urban registered unemployed
- urban registered unemployment rate
- urban rehabilitation
- urban relict natural community
- urban remote sensing
- urban renewal
- urban renewal and regeneration
- Urban Renewal in Canada
- urban residential area
- urban residential committee
- urban residential land planning
- urban residents in Shang Dynasty
- urban residual natural vegetation
- urban resilience for disaster
- urban revitalization
- Urban Riots
- urban road
- urban road capacity
- urban road detection
- urban road form
- urban road grade
- urban road intersections