visual line造句

Visual line of position
目测位置线
H means the river front construction , d means the distance between river front constructions and river bank , d " means the distance between river front construction and the river bank on the other side , a means the angle of the visual line from the spot near the river bank and horizon
本文总结“滨河恒等式” ，针对城市骨干河流水系(河宽大于或等于40米)控制其空间围合度。 h (滨河建筑高度) ， d (滨河建筑离河岸距离) ， d (滨河建筑离河对岸距离) ， (人在河边看河对岸景物仰视角度) 。
It's difficult to find visual line in a sentence. 用visual line造句挺难的