范·奥斯坦称那些化学物质为“防晒霜”，用来防止更严重的光损伤，并帮助重建受损的聚合物纤维。
Van Oosten calls those chemicals "sunscreens" because their goal was to prevent further light damage and rebuild worn polymer fibers.
维他命d这种“阳光维他命”是我们晒太阳时，在皮肤中合成的一种物质，但防晒霜会阻碍这一过程的发生。
The "sunshine vitamin" is synthesized in our skin when we are exposed to direct sunlight, but sunblock impedes this process.
不是所有的防晒霜都含有问题的化学物质，如果你要小心点的话，就选择含氧化锌，二氧化钛或者麦素宁的。
Not all sunscreens contain the chemical in question, so if you're concerned, opt for those made with zinc oxide, titanium dioxide or Mexoryl.
现在，有几种天然防晒成分已经买不到了，而只用人工合成化学物质显然是没法达到足够的防晒指数的。
Except that a couple of the originals have disappeared from sale, apparently unable to provide sufficient SPF without help from man-made chemicals.
这两种物质都不会穿透皮肤，基于这两种成分的防晒霜效果好，还安全。
Neither one of these seems to penetrate the skin, and sunscreens based on these ingredients appear to be safe as well as effective.
据美国疾控中心的一项研究表明，防晒霜中的某些化学物质一旦被皮肤吸收就会成为致癌因子。
Some ingredients found in sunscreens like oxybenzone are designed to protect the skin but may lead to cancer, according to a study by the US Center for Disease Control.
雌激素样物质：包括已知的化学物质对羟苯甲酸酯在内，常用于制作化妆品、防晒霜和保湿露。
Oestrogen-like substances, including chemicals known as parabens, occur in cosmetics, sun creams and moisturising lotions.
一旦防晒霜渗透进皮肤里，便能与阳光作用在皮肤表层之下产生有害物质。
Once it soaks into the skin it can react with sunlight to cause damage below the surface.
一项新的研究表明：防晒霜中含有的滤光物质可以阻隔紫外线辐射，同时也会产生有害化合物伤害皮肤细胞。
Filters contained in sunscreen that keep out ultraviolet (UV) radiation can generate harmful compounds that attack skin cells, says a new study.
至少每隔两小时要补一次防晒，因为保护物质会慢慢分解。
It should then be re applied at least every two hours, as the protective filters can break down over time.
至少每隔两小时要补一次防晒，因为保护物质会慢慢分解。
It should then be re applied at least every two hours, as the protective filters can break down over time.
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