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
- teacher online professional learning and development
- teacher paid by the local people
- teacher professional development
- teacher professional development institution
- teacher professional ethics
- teacher professionalization
- teacher professional learning community
- teacher professional socialization
- Teacher Qi Opera Troupe
- teacher quality
- teacher reflection
- teacher resilience
- teacher resource management
- teacher rotation system
- teacher's belief
- teachers' career development
- teachers' continuing education
- teachers' decision-making
- teachers'leading style
- teachers' morality
- teachers' obligations
- teachers' personal responsibility
- teachers' professional technical position
- teacher's role
- teachers' role