backsight
/'bæksait/
📖 中文释义
- n. 后视, 表尺缺口
📘 English Definition（英文释义）
- n. The reading of the leveling staff in its unchanged
- position when the leveling instrument has been taken to a new position;
- a sight directed backwards to a station previously occupied. Cf.
- Foresight, n., 3.