求翻译：肿瘤组织具有异质性，不同肿瘤患者由于遗传背景不同对抗癌药物的反应各有差异。而目前临床上大多凭经验用药，同一化疗方案固定不变的应用于许多患者，忽视个体差异因而存在盲目性，使总体疗效不佳。近年来，针对肿瘤患者个体化治疗的抗肿瘤药物敏感性试验迅速发展，其对抗癌药物进行筛选，可为临床选择合适的治疗方案，提高治疗疗效，减轻药物的毒副反应及预防多药耐药的发生，对预测患者生存期以及肿瘤基础研究等都有重要意义。本文将从多种常用恶性肿瘤治疗药物敏感性方法、待解决的问题及其临床应用进展等进行综述。是什么意思？

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Tumor heterogeneity, with different tumor patients, because genetic background is different from the fight against cancer drug response. On the most current clinical experience with the medication, the same chemotherapy program is fixed to ignore many patients, individual differences, and thus there

Tumor heterogeneity with, different because of different genetic background in cancer patients on anti-cancer drug response vary. Mostly experience currently on the clinical use of drugs, chemotherapy is not constant in many patients, neglected individual differences and blindness, and total ineffic