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。
2
Prevent electric equipment ageing to cause the step with the most significant fire, it is seasonable examination and accurate decide ageing degree tries to update.
防止电气设备老化引起火灾最有效的措施，就是及时检查与正确判定老化程度并加以更新。
3
The controlling step of the ageing reaction for the directing agent of zeolite L is directional polymerization between aluminosilicate oligomers or between aluminosilicate and silicate oligomers.