Free radicals are believed to be a first important step in heart disease, cancer and the ageing process.

自由基被认为是心脏病，癌症和老化过程中重要的第一步。

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Free radicals are believed to be a first important step in heart disease, cancer and the ageing process.

自由基被认为是心脏病，癌症和老化过程中重要的第一步。

youdao