1.新增样本数量，但是新增的样本数量有限，无法满足传统分类模型的训练需求。
2.模型只能识别已知角色，对未注册角色缺乏适配能力。
3.每次新增角色都需要重新训练模型，更新周期长。
希望能对以上的问题有一个比较靠谱的解决方案，能解决以上的几个问题
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