当研究人员在癌细胞中的两个基因的功能，在实验室中培养，细胞变得非常脆弱的蒽环类化合物。
When the researchers knocked out the two genes' function in cancer cells grown in the laboratory, the cells became vulnerable to anthracycline compounds.
但是在癌细胞中，细胞的凋亡机制被破坏，它们冲破了命运的束缚，于是生长不再受到限制，肿瘤也随之产生。
But in cancer cells this mechanism has often been genetically disabled or otherwise broken, allowing tumors to proliferate.
越来越多的证据表明在一生中我们所有人有时在体内都会出现癌细胞。
An increasing body of evidence suggests that all of us have cancer cells in our bodies at times during our lives.
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