DNA damage can lead to various diseases, including cancer, but Case said the changes observed in his experiments did not lead him to believe the fibrolasts were becoming cancerous.
DNA的损坏可导致包括癌症在内的多种疾病，但凯斯表示，他在这项实验中所观察到的成纤维细胞的变化，不能让他确信成纤维细胞已癌变。
He has failed in his experiments many times, but he believes that failure is the mother of success.
他在实验中多次失败，但他相信失败是成功之母。
She assisted him in his experiments.
她协助他做实验。
She assisted him in his experiments.
她协助他做实验。
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