The nonionizing radiation given off by cellphones is too weak to break chemical bonds or damage DNA.
手机发出的非电离辐射很弱，不足以断开化学键或破坏DNA。
The results showed that the DR's DNA double strand break damage caused by heavy ion beams could be repaired through culture, and the repairing time extended as the increment of radiation dose.
结果表明，抗辐射菌经重离子射线照射后所引起的DNA二条链的切断损伤经过培养能被修复；切断的DNA二条链的修复时间随着照射剂量的增加而延长；
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