sun protection factor
短语[医]防日光系数
词形变化
sun protection factors
复数
sun protection factors
别名
SPF
释义与例句
n.
-
1.
An indication of how long a sunscreen remains effective when applied to the skin.
防晒系数
防晒指数
防日光系数
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.