backsight与foresight的用法辨析:
1. 词源与核心语义
backsight(后视/后照准)由back(后)+sight(视线)构成,指"向后观察"的物理动作或反思行为
foresight(前瞻/前照准)由fore(前)+sight构成,强调"向前预见"的能力
2. 专业领域用法
测绘学:
- backsight:后视测量(已知点到仪器的反向观测)
- foresight:前视测量(仪器到待测点的正向观测)
例:The surveyor took a backsight to Benchmark A before recording the foresight to the ...(以上内容有节略,please sign in for more)
网络相关图 backsight foresight