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
- spacecraft design
- spacecraft entry technique
- spacecraft formation flight control
- spacecraft launch
- spacecraft launching site
- spacecraft magnetic test
- spacecraft manufacturing
- spacecraft material
- spacecraft navigation
- spacecraft nutation
- spacecraft operation
- spacecraft orbit control
- spacecraft project development phases
- spacecraft ranging
- spacecraft recovery system
- spacecraft relative motion
- spacecraft returning technique
- spacecraft scale style movement
- spacecraft systems engineering
- spacecraft test
- spacecraft thrust vector control
- space cueing task
- space curve
- space curve of order n
- spaced antennas