因为阳光会逐渐减弱防晒霜的效果，如果你打算在直射的阳光下多待一段时间，每一两个小时重新涂一下防晒霜。
Because sun breaks down its effectiveness over time, if you're going to be in direct sunlight for an extended period, reapply every hour or two.
最近我在旧金山待了一段时间，因而有机会在旧金山国际亚美电影节欣赏一部新纪录片——《黄柳霜，黄柳霜》。 作为亚裔美国人，我一直都对黄柳霜感兴趣。
While in San Francisco recently, I had a chance to check out the new documentary Anna May Wong: Frosted Yellow Willows at the San Francisco International Asian American Film Festival.
如果你必须在这个时间段外出的话，就要穿防护服和擦发晒霜，这样能使你避免有害紫外线的照射。
If you have to go outdoors during the peak daylight hours, wear protective clothing and sunscreen that will protect you from harmful ultraviolet (UV) rays.
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