Be sure to apply sunscreen, or just use your facial moisturizer with SPF, all the way down past your neck though your chest each morning.
一定要涂抹防晒霜，或者只使用含有 SPF 的面部保湿霜，每天早晨从你的脖子一直到你的胸部。
The researchers gave the subjects sunscreen to be sure they'd have access to it.
研究人员同时把防晒霜交给受试者，确保他们能够使用。
Be sure to apply sunscreen, or just use your facial moisturizer with SPF, all the way down past your neck though your chest each morning and reapply during the day as necessary.
一定要涂上防晒霜，否则用SPF面部保湿，在每天早晨用所有这样方式沿着你的脖子向下通过你的胸，并且在必要时一天中再重复一遍。
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