图片的说明文字解释了图中人物的身份。
The ___caption below the picture identifies the people in it.
离婚申请书的标题是"史密斯诉史密斯案"。
The divorce petition had the ___caption 'Smith vs. Smith'.
照片下的说明文字清楚地概括了它的主题。
The ___caption beneath the photograph clearly summarizes its theme.