理解程度的英文：
n. span of apprehension

参考例句：

A verBal aptitude test.
文字理解程度的性向测试

span是什么意思：
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。

apprehension是什么意思：
n. 忧虑，恐惧；逮捕；理解

It was intended to impede the apprehension of the person
它旨在妨碍对该人的拘押的。

Details of their apprehension are still unclear.
逮捕的细节目前仍不清楚。

It is a pity that they are not apprehensive about the law
悯不畏法

She is an apprehensive girl.
她是个善解人意的女孩。

The apprehension of the robbers, escaped prisoners, etc.
逮捕强盗，逃犯等。