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。
In his experiments, Bower used a toy train that went behind a screen.
实验中，鲍尔让一辆玩具火车开到屏风的后面。
In his experiments, Bower used a toy train that went behind a screen.
实验中，鲍尔让一辆玩具火车开到屏风的后面。
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