视幅的英文：
eye span
n. 眼睛；视力；眼光；见解，观点
v. 注视，细看
An eye for an eye and a tooth for a tooth
以眼还眼,以牙还牙
It is a mere coincidence that they see eye to eye on this point.
他们在这一点上见解一致完全是巧合。
I think we see eye to eye on that subject.
我认为我们在那个问题上看法一致。
Eye broccoli is the exact opposite of eye candy.
Eye broccoli 和 eye candy（外表悦目的人）意思相反。
Her eyes rolled with curiosity.
她的眼睛因好奇而左右转动。
n. 跨度；范围；一段时间
v. 以指测量；以掌测量；跨越；持续
They spanned windows with bricks.
他们在窗子上用砖砌了拱顶。
a memory [attention] span
记忆 [注意力] 持续的期间[时间]
span a river with a bridge
在河上架桥
He spanned his wrist.
他握住手腕部量量看有多粗。
He has a short attention span.
他的注意力持续时间短。