绿网里面提供的OCR内容检测服务，为什么检测的图片只给返回一部分结果？

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    ["ImageName"] => string(68) "http://hg707.oss-cn-beijing.aliyuncs.com/Uploads/2016-11-04/test.png"
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}
["Msg"] => string(15) "调用成功。"
["Code"] => string(7) "Success"
}