说明的英文：
explain
caption

参考例句：

Account for ; justify;answer for
说明;解释

Delivery instructions
交货说明

A rational explanation.
合理的说明。

Poverty of speech is the outward evidence of poverty of mind.
语言贫乏说明头脑空虚。

Selves need no explaining;be self-evident
无需说明;不言自喻

An apposite comment,illustration,example,etc
恰当的评论,说明,例子等

A meticulous account
过于详细的说明

She has proved herself unreliable.
她的表现说明她靠不住。

I wrote an excuse for my absence from school.
我写了一张请假条，说明缺课的原因。

The structure of the pelvic bones showed the skeleton was that of a female.
骨盆构造说明，这个骨胳是女性的。

explain是什么意思：
v. 讲解，解释；说明…的原因；辩解

explain puzzles
解释难题

Explain the advantages and disadvantages of globalization.
解释全球化的优缺点。

Rita and Frank explain all...
丽塔和弗拉克说出了一切……

I cannot explain why.
我说不出理由。

The theorem may be explained as follows.
这条原理可以这样来阐述。

caption是什么意思：
n. 字幕；说明文字；标题
v. 加上说明；加上标题

The window has a caption.
窗口有一个标题。

It has no border or caption.
它没有边框和标题。

To furnish a caption for.
给…加标题（或文字说明）；为…配字幕

There is a caption under the picture.
图片下边附有说明。

In any case their names were in the caption at the bottom
反正下面的说明中有他们的名字。