视线的英文：
line of sight
view line

参考例句：

radial velocity
径向速度;视线速度

When the parents squint the children become cockeyed.
父母视线不正，孩子也变斜眼。

The pigeon was flying higher and higher, and was out of view at the end
那只鸽子越飞越高，最后从视线中消失了。

Blinder:a pair of leather flaps attached to a horse's bridle to curtail side vision.
马的眼罩:系在马勒上缩短侧面视线的一对皮罩。

"To remove, as from view; obliterate."
从视线中移开;消失。

Out of sight; out of eye distance
看不见;视线之外

Unsight an opponent
挡住对方视线

A curtain hides us from view.
窗帘遮住了我们的视线。

fastened her gaze on the stranger.
把她的视线集中在陌生人身上

She withdrew her eyes from me.
她把视线从我身上移开。

line是什么意思：
n. 线条，界线，路线；条纹；排；铁路线；生产线；台词；态度；防线；前线
v. 用线标出，划线于；使布满纹络；加衬里于；排队，排列成行

This is a lined trunk.
这是一个有衬里的箱子。

They are politically in line.
他们在政治上意见一致。

On a map there are horizontal lines and vertical lines.
在地图上有水平的线和垂直的线。

sight是什么意思：
n. 视力；景象；眼界；见解
v. 看见；瞄准
adj. 见票即付的；即席的

appear in sight
出现于视域内

intermediate sight
中间观测

Not a savage in sight.
没有看到一个野蛮人。

view是什么意思：
n. 看法，观点；观看；看；视野；风景
v. 把...视为；看待；看；观看；察看

There was not a person in view.
放眼望去一个人也没有。

They are viewed as models.
他们被看作模范。

There's a grand view of the mountains.
这儿可以看到群山的壮丽景象。