sun protection factor

名词 n.
中文释义

英文释义

名词 n.
  1. An indication of how long a sunscreen remains effective when applied to the skin.
    — If someone normally burns in 10 minutes with no sunscreen, then a sunscreen with sun protection factor 20 will provide protection for up to 20 × 10 = 200 minutes.

词形变化

sun protection factors plural
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