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通勤与室内活动
Scenario: You’re headed to the office or school, or are engaging in indoor activities that require little time in the sun.
适用情境：去公司上班、去上学，或是参与几乎晒不到太阳的室内活动。
SPF (Sun Protection Factor) requirement: 15 or less
防晒系数: ≤15
Solution: Even a two-hour shopping spree in a brightly lit indoor mall is equivalent to spending about an hour in the sun, because fluorescent light bulbs also emit UV rays.
防晒建议：在灯火通明的购物中心里扫货两小时，几乎等于在大太阳底下曝晒一小时，因为商场里的各种荧光灯也会产生紫外线辐射。
A moisturizer, sunblock or foundation with an SPF is the perfect choice. Many have an SPF of no more than 15, which is usually sufficient to avoid damaging UV rays. But if you’re still worried about the protection effect, you can also double up. Use a moisturizer or a BB cream, and then top it off with an SPF 15 sunscreen.
此时，保湿霜，隔离霜，或者有防晒功能的粉底霜都是不错的选择，通常，大多数此类产品都有防晒作用（SPF≤15），足以防护具有杀伤力的紫外线。如果你仍然不太放心，还可以强强联合——先用保湿霜或者BB霜，然后，再涂一层防晒系数15的防晒霜。
