several sessions of surgical therapy
色素痣分次切除术治疗疗效观察--(皮肤美容) 关键词]色素痣；分次切除；疗效观察 [gap=1013]Key words: pigmented nevus；several sessions of surgical therapy；observing the therapeutic effect
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several sessions of surgical therapy
几次手术治疗
以上为机器翻译结果，长、整句建议使用 人工翻译 。