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It's frequently the case that new drugs, which work on these lab-grown cells, will fail in clinical trials with real patients. One of the complexities of aggressive tumors is that they can have multiple populations of slightly different cancerous cells.
常有的是，新藥能作用在實驗室培養出的細胞，卻在人體測試階段時失去效用。惡性腫瘤的複雜性在於它能分裂出許多有些微差異的癌細胞群。
學習重點
4. aggressive 侵略的、侵犯的
aggressive
[əˋgrɛsɪv] (adj.) 侵略的、侵犯的
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