自由基被认为是心脏病，癌症和老化过程中重要的第一步。
Free radicals are believed to be a first important step in heart disease, cancer and the ageing process.
HDL也能防止癌症和老化，对神经系统的正常运作也是必要的。
HDL also serves as a guard against cancer and aging and is necessary for proper neurological functioning.
防晒霜可以阻止导致晒伤的短波紫外线，更新的一些配方还可以阻止导致皱纹和老化的长波紫外线。
Sunscreens do block the UVB radiation that causes sunburn, and more recent formulas also block the UVA radiation that causes wrinkles and aging.
应用推荐