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Describe the current behavior / 问题描述 (Mandatory / 必填)

mamba 目录下缺少readme介绍，请补充

Environment / 环境信息 (Mandatory / 必填)

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Steps to reproduce the issue / 重现步骤 (Mandatory / 必填)

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Describe the expected behavior / 预期结果 (Mandatory / 必填)

readme介绍信息完善

Related log / screenshot / 日志 / 截图 (Mandatory / 必填)

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